Oh hells yeah, I usually trip during the daytime and have cooked plenty of meals while at the end of the plateau or during the comedown. I have to, I live and trip alone, so if I don't cook or have something leftover in the fridge, and I'm out of granola or cereal, I ain't eatin' that night.... Cooking while tripping is also good mental exercise, it's like strength-training for your short-term memory and your ability to focus and stay on task.
Pasta is always easy to do, and you can do it in all in a single pot so you won't have much to clean up afterwards:
* First boil the water, wait for it to start boiling, you'll see little bubbles form on the bottom of the pot and then one-by-one they'll decide to float up to the top and pop. Don't worry about that adage "a watched pot never boils", thanks to your altered 5-ht2 receptors this process can be TOTALLY FASCINATING and amusing to watch. More and more bubbles will form, coalitions of them will form and then break apart to join new coalitions, and soon enough the entire surface of the water will be roiling and making lots of waves (also fascinating to watch). Now add about 1-2 tablespoons of salt, and marvel at the beauty of the chaotic fractal forms that appear as the salt dissolves. And you haven't even added the pasta yet! How exciting!
* Now add the pasta in it and let it cook, stirring occasionally, until you try a piece and it's a little chewy but not too hard. This usually takes about 8-12 minutes depending on the shape of the pasta you're using. The box will probably have a suggested "al-dente" cooking time, but these aren't always right, so it's best if you check yourself. Don't wander away at this point and get distracted by staring at your drywall or trying to convince your cat/dog/ferret/whatever that it's really an incarnation of Krishna or something, you need to stay in the kitchen and keep an eye on the pasta so it doesn't overcook it into mush. You're allowed to stare at the wood patterns on your cabinets, but don't get too caught up solving the mysteries of life and existence right now, always keep in the back of your mind that there is a pot full of boiling water and pasta on the stove on a hot burner cooking RIGHT NOW!!! The mysteries of life and existence will still be here after you're done cooking. Also don't try anything stupid, like dunking your hand in the boiling water just to have the experience of what it feels like or because you think you've been God all along and this is all just an illusion you're dreaming, and so nothing can really harm You. Maybe that's true, but that doesn't mean you're not still inhabiting a human body too, and getting third-degree burns won't be anywhere near as fun as you're imagining it to be. Keep your head straight and keep focused on your task, you silly druggie!
* Next get a measuring cup and save part of the water the pasta cooked in, then drain the pasta in a colander (DO NOT RINSE, it washes off the glutens which help thicken the sauce) and leave it in the sink.
* Put the pot back on the stove and turn the heat up to medium. Now you have a couple options, either you've got some jars of sauce in the cupboard, or you have some butter and garlic (I get little jars of prechopped garlic at the store, maybe that's just an American thing because those of you in the rest of the world know lazy we all are.....no wait it's not laziness, it's efficiency!
) Third option is to have been cooking a sauce from scratch in a separate pot while the pasta was boiling, but this is only for advanced trippers who still retain enough short-term memory to keep track of TWO things cooking at the same time and can manage washing an entire other pot after the first one without getting yourself stuck in a time-loop.
* If you're using jar sauce, just pour some into the pot, then immediately add the pasta and a splash of the saved pasta water, and stir until the noodles are covered in the sauce. If it's too thick, thin it out some with a little more of the saved pasta water and stir. If it's too thin, just let it boil off some while stirring occasionally, though the pasta might end up getting a little mushier than you wanted, so it's better to err on the thick side. Let the pasta cook in the sauce for about 30-60 seconds, until it gets a velvety sheen from the glutens in the pasta water and the noodles (which you DID NOT rinse, right? Again, this is probably an American thing, if you're in a Mediterranean nation and have been cooking pasta since you could stand upright then please stop rolling yer eyes at us from over there and making rude/dramatic gestures while muttering things about our collective idiocy using words you'd never say in front of your grandmother, kthx)
* If you just want butter and garlic, then chop up a clove of garlic (not necessary if you're a lazy, I mean efficient, American like me and you already bought a jar of pre-chopped garlic), then add 2-4 tablespoons of butter, cutting them up in 1-tbsp pieces, and as it's melting add the garlic and let it sizzle for about 30 seconds, stirring occasionally. Make sure not to burn the garlic, it will turn brown and gain a bitter taste, and it'll probably taste to you like Satan's ass because you're still tripping and all of your senses are heightened. Once the garlic's cooked, if you happen to have some spinach, you can add a handful of it along with some black or red pepper, and stir until it wilts, this will be another 30 seconds. Then dump the pasta into the pot and stir in a splash of the cooking water, and let this cook another 30-60 seconds, stirring occasionally. If you didn't use spinach before and haven't added any pepper yet, then do so now while the cooking water is boiling off. (If you're still tripping pretty heavily and 30 seconds seems like an infinity of lifetimes and universes to you, then a kitchen timer will come in quite handy - you've already proven your ability to turn knobs by turning the stovetop on, so you should have no problem operating it! Just be sure you can read the numbers well enough and they're not too melty)
* Now the pasta is cooked to the right texture and has absorbed some of the sauce. Turn off the stove and use a pasta fork to spoon the contents of the pot onto a plate. Don't just dump the pot over the plate, you'll likely miss and your cat/dog/ferret/whatever will come in and eat half your dinner from off the floor. (Ever notice how on every cooking show on TV the professional chef will always spoon food out of the pot one at a time onto the serving plate, instead of just inverting the pot over the plate and hoping for the best? This is why)
* Add as little or as much Parmesan cheese as you want, and sprinkle some parsely on top. You're done! And it looks just like what'd you'd get in that fancy-schmancy restaurant downtown that charges you 15 bucks a plate and is full of snobby foodie yuppies who want to order something that doesn't even exist on the menu, and detached smartphone-staring unshaven hipsters, and various other specimens of humanity that make your carotid arteries throb uncomfortably, doesn't it? The only real difference is, you can now eat your meal in peace at your own home, curled up on the couch in your pajamas, without having to be in the presence of all those special-snowflake yuppies making obscure demands to their waiter at a calculatedly high volume so everyone in the place knows how knowledgable they are about what's in season and can be sourced locally, and social media-obsessed unshaven hipsters who keep taking photos of their plate and each other to post to Instagram and then spend five minutes finding the perfect filter for their photo without taking another bite, letting their overpriced food go cold, and various other specimens of humanity that put you at risk for high blood pressure (whether this is an advantage to you or not is a matter of opinion of course). And you can take pride in having accomplished a moderately complex task all by yourself while under adverse mental conditions, without making a huge mess in the process or otherwise breaking reality and the space-time continuum! Yaaay for you!
Anyways, that was pretty detailed, but it's a lot easier than it looks. Just do a few trial run-throughs while sober so you have the process down and in your muscle memory before you try this while tripping and you end up forgetting what you're doing and start pontificating in your mind about how the soul-harvester aliens are controlling our society through the addition of high-fructose corn syrup in all of our prepared foods (oh wait, this is another Americanism, never mind about that the rest of you, and be glad you never had a President Richard Fucking Nixon massively subsidize the industrial production of corn throughout the agricultural areas of your country 45 years ago. Oh wait, you're not an American, so you probably call it "maize", not "corn", huh? Well whatever you call it, be glad the stuff's not being added to every last thing in your nation's food supply, it's really not meant to be refined into a sickeningly sticky mass of sugary goo and unknowingly ingested by humans in large quantities three meals a day. See, that's how the aliens are maintaining their secret control over us, they know the average American is too lazy, I mean efficient, to be bothered to read the ingredient list on everything they buy).
The main rule of thumb is, you can entertain yourself with your wacky thought-loops and imaginings while things are cooking, just don't get carried away with them, and stay on task and remember where you are in the process. This works best if you've already peaked and are on the plateau or coming down. Otherwise you might end up with a brilliant solution to the world's renewable energy crisis and a pot full of burned, stuck on pasta that won't even come off with a sander, and the one is not going to help you with the other, unfortunately. The other rule of thumb is, be careful not to overuse salt or spices as your cooking, because your tripping and your tastebuds are extra-sensitive right now and it can come out completely unplatable, in which case give it to your cat/dog/ferret/whatever, I'm sure they'd be overjoyed and will love you forever, or at least until next mealtime.
Good luck, and enjoy! :D
(tl;dr - it is possible to cook an entire pot of pasta all by yourself while tripping yer face off without killing yourself or destroying your kitchen or frightening your cat/dog/ferret/whatever too badly)