here's what i liked to eat when i first moved out
breakfast: oatmeal, breakfast burrito with eggs/cheese/potatoes and hot sauce, home fries (buy a huge jug of oil cheap at grocery outlet or costco)
lunch: salads, leftover dinner, cheap lunchmeat or leftover meat sliced thin in lettuce wraps or spring rolls or in homemade bread, potato salad, etc
dinner: rice, cheap pasta, potatoes, seasonal! veggies, cheap meat bought in bulk and frozen, curries, soups, homemade bread rolls, etc
i bought a lot of bulk because i had space, a 2nd freezer i got free off craigslist, and i like making my own shit, so i do things like butcher whole chickens (make stock with the bones), make my own sausages (pork shoulder ~1.99/lb), my own bread (flour and yeast cheap as all get out), and garden.
i'd avoid eating too much meat or processed foods/snack foods because that's where you'll lose your money. like don't even buy them until you have spare money, or a reason to celebrate, so you can't even enjoy them if you tried. veggies will fill you up so eat mostly veggies.
if you gotta buy meat here's where i pinch my dollars on it:
beef: i use ground pork primarily b/c it's cheaper (2$ a lbs or so) but if i buy beef i'll get an entire chuck roast (~3-4$/lbs sometimes) and cut steaks and kebab cubes from it
pork: ground pork, small cutlets at costco in bulk, entire shoulders to cut up
chicken: entire chickens ~2 birds for 10$ at costco. break em down and get tendies, wings, thighs, drums, and the bones make enough stock for two big soups
fish: a lot of seafood is expensive so buy seasonal. swai, whiting, and other cheap fish is good once in a while. if it tastes too muddy i usually bread em in panko and fry em for fish tacos
other things i buy in bulk to save money on and use cheap: bread can be frozen and defrosted, bags of rice, flour, beans, potatoes & onions, bacon & hot dogs & lunchmeat, huge cheese logs, seasonal veg can be frozen for use, huge boxes of canned corn