I'm currently living in a dorm-like building with one shared kitchen. The kitchen is a mess, often crowded, and I don't like chatting with strangers while I cook, so I want to try basically avoiding it altogether.
As for goals, I need to lose fat. That is first and foremost. I do not mind a repetitive diet. In fact, I prefer it.
So, I was thinking about basically living on canned tuna, bananas, and grass-fed butter for the next couple of months. This provides my protein, fat, and carb needs. I know it's far from the ideal of grassfed steaks and sweet potatoes - but it still seems pretty healthy to me. And cheap and easy as well.
Has anyone had experience with a Spartan diet like this? I know it'll be bland, but that doesn't bother me much. I do better when I suck it up and just focus on simple and easy meals. Like I said, I know it's not ideal - but I'm currently eating fast food, so it would be a huge improvement from that.
Tuna - that's lots of mercury, even if you're not a female of childbearing age. Can you add in more proteins (beef jerky can be expensive but that's one option. Raw eggs are another option - buy a half dozen and eat all at once). You could also go for sardines and canned salmon.
Fats - butter is always good, but I'd think coconut oil is also an option. Avocados are too. You just need a knife and spoon for those.
Any reason bananas are your only produce?
There are a lot of other veggies and fruits you can eat for variety -- tomatoes, bananas, oranges, pears, plums, etc (depending on what's in season and available). You don't actually need utensils to eat an avocado. I would HIGHLY recommend those. In addition to coconut oil, you can also get shredded coconut (again variety).
I assume you are not allowed to have a hot plate? Have you thought of that?
Another option might be to sneak down to the kitchen once a week when no one else is around to boil up a couple dozen eggs or even throw a whole chicken into the oven. Then you can munch on those as the week goes along.
Also, see if you can find any good quality deli meats -- salami, etc. There are some that aren't full of sugar and gluten.
Can of fish, can of veggies, fat of choice, spice of choice. Mix all in a bowl, microwave (assuming you have one) until heated through. Shouldn't take more than 5 minutes to open 2 cans, walk down to your kitchen area, and microwave it to desired temperature.
In my area, some local butcher shops also sell things like canned beef, pork, chicken, etc... Precooked, you simply reheat.
I would not think that a diet consisting entirely or primarily of canned tuna, bananas, and butter would provide anywhere near optimal, or even adequate, nutrition. You do have to pay some attention to vitamins and minerals, not just macronutrient balance.
There are plenty of other options that can be stored (for at least a few days), prepared, and eaten at room temperature. Look at raw vegan recipes. Not that I'm proposing a raw vegan lifestyle, but it will give you plenty of options that don't require more than a knife and cutting board. If you have access to a refrigerator, crock pot, or toaster oven, your options increase even more.