I make “cheater tacos” with 7-layer Mexican dip. Get some tortillas, maybe some extra refried beans, extra guacamole, fry up some ground beef (or get some chicken). Put the meat in the tortillas, add the dip and any extra beans or guac you want.
Pot Pies. (This came to me because they’re on sale for $.39 a piece this week at my store.)
Those (Betty Crocker?) meals in a box - they’re called Complete Meals - they have for example chicken and dumplings, chicken and biscuits - tons of different versions, and they’re GOOD. One will probably last you two days, too.
Also, there are frozen dinners that are usually $1 each - they’re (I think) Swanson’s - and are usually on sale $10 for 10. They aren’t big ole Hungry Man dinners, but they make a nice lunch for me anyway.
Also, don’t forget the inherent value in comfort food - like spaghetti o’s. 
Also, just buy some chicken parts or a whole cut-up chicken. Heat the oven at about 400 F. Start the dark meat pieces. 5-10 minutes later add the white meat - it cooks faster. Bake for 30-35 minutes total. The chicken is done when you pierce the thickest piece (breast or thigh) with a knife and the juices run clear.
If you want barbecue sauce, spread it on the chicken in the last 5 minutes.
Otherwise, season as you want. Salt, pepper, lemon, garlic, etc.
Other easy-to-use low-prep for chicken: a Bag-and-Bake thingie (in the spice aisle) or use Shake ‘n’ Bake.
When I was a kid, “Tuna Noodle Casserole” was made of: 1 prepared box of mac & cheese, 1 drained can of tuna in water, 1 drained can of peas (or peas & carrots), and a couple of handfuls of breadcrumbs or crushed potato chips on top. It’s not fancy, but it’ll do in a pinch. (If you’re feeling really fancy, you can substitute cooked elbow macaroni and a can of cream-of-whatever soup for the mac & cheese).
One of my husband’s favorite dinners is a box of scalloped or au gratin potatoes prepared according to package directions, except we put pork chops or cut-up sausage in the casserole dish before we put it in the over, and let everything cook together. Serve with whatever veggie you feel like.
I make it one big, big pot at a time, and then freeze in single or duo sized containers. It actually tastes better after being frozen.
I live on low prep meals 
One of my favorite easy dinners is premade tortellini or raviolli. I boil it, and then mix it in a bowl with cooked veggies (precut frozen ones if I’m especially lazy) and either pasta sauce or shredded cheese.
grab a box/bag/jar of cous-cous and some Bulon type spices, chicken works well. and some canned chunk chicken. its silly how easy it is to cook.
heat some water to boil in microwave, with the spice already in the water for flavor, add cous cous and then on top put the drained can of chicken and wait 5 min for it to abosrb the water, then eat.