Usually I bring cereal, milk, bananas, English Muffins, Cream Cheese and yogurt for our breakfasts. We only stay in studios in CA (less than 1/2 an hour from home) so often I bring leftovers from earlier in the week, but if I did need to plan on actually cooking meals in a studio here are the things that I would plan:
Tuna sandwiches: you can bring the tuna in your suitcase, get the mayo & relish packets from a CS restaurant, and the bread at the store at the resort.
Chili: really easy to heat up
Any Packaged noodles that you can just add water
Hot dogs, keilbasa, or other cured meats in casings.
Salad
There's a ton of things if you're creative enough!