frozen bag of boneless skinless chicken breast can be prepared any number of ways.
Thaw chicken, crack an egg and dip the chicken in it, then roll in Italian bread crumbs or crushed corn flakes (my preferred). Make some rice, or a potato or something. Eat for like 2.50
Take chicken breast, put a couple in a oven safe container. Pour BBQ sauce, or a marinade over it. Put some veggies in a microwave safe container, spash of water and some cling wrap. Puncture once and cook for 30sec - 1min. Steamed veggies and chicken.
Buy frozen talapia (white fish, that cost like $10 for a bag of it), thaw a couple pieces. Put in oven container with Hawaiian marinade. Buy and cook Uncle Bens fried rice (less then $1). Have some fish over rice.
Buy a croc pot, throw random meat and veggies in it in the morning. Come home to hearty meal that will last a few days. (I made pork chops, chicken, roast, stew, etc etc etc). Croc parts are great for throwing anything in, adding some beef or chicken flavor and coming home to hot food.
Stoffers frozen meals when they are like 1.50 each. When I was working out a lot I would eat two for dinner. $3 dinner, sweet.
Lean pockets, french bread pizza, cold cuts, Super Pretzel with some melted Kraft cheese, etc.
I could go on all night, you have endless options. There is no reason why you cannot have a nice hearty home cooked meal for less then $5. Plus the ladies like when you can cook a little something.