Homemade chicken sandwiches. Banquet or Tyson breaded chicken filets, buns/bread, cheese and toppings if you’re feeling fancy. Pop a filet in the microwave or toaster oven while you prep your bun.

Recently spent 30 minutes meal prepping breakfast burritos for the freezer. Eggs are pricey but if you find a good deal you could make a weeks worth of food in a very short time. Especially if you assemble line the process.

Like someone else mentioned, Walmart sells precooked fajita style steak or chicken. Throw it in a tortilla or pita with veggies.

ETA: make big pots of soup when you can and freeze the left overs. You can pull some out the night before to start thawing. Should be able to cook in a microwave as well.