I'm a vegetarian but my basic pantry consists of:
Eggs - Dozen or so a week.
Beans - pink beans, black beans, pinto beans, canned for ease, maybe some mashed pintos if you'er lazy. Extra firm tofu for stir fry.
Rice - I usually keep a medium grain Japanese for versatility.
Cheese - 2lbs cheddar, 1/2 lb chunk pecorino romano, 1/2 lb chunk parmesan reggianoo, lb of some ovolini of mozzarella, and 1/2 lb sliced provolone.
Pasta - 2 lbs each on hand spaghettini, linguini fini, mezze rigatoni.
Bread - boule of sourdough, corn tortillas.
Spices/condiments - salt, pepper, garlic, olive oil, chili oil, gochuchang, good salsa.
Vegetables - onion, mushrooms, romaine hearts, spinach, mesclun.
Fruit - bananas, apples.
Dairy - milk, cream, butter, sour cream, creme fraiche.
With this you can make an endless assortment of easy, delicious things. Grilled cheese with provolone and mozz. Egg sandwich with gochuchang mayo. Rice and beans with grated cheddar. Scrambled eggs and toast. Aglio e olio. Poor man's carbonara. Quesadillas. Fried eggs on tortillas with salsa. Mushroom cream sauce with linguini. Sauteed spinach. Simple caesar salad. Etc. etc.