Chicken cutlet.
Just throw a chicken breast in a ziploc bag & pound it down to about 1/4" or 3/8" by whacking it with a wooden rolling pin. Cook for 6 minutes per side over medium in a cast-iron frying pan in a bit of olive oil. I cooked chicken wrong my whole life ("struggle chicken") before discovering this trick (keeps it moist but with a bit of a nice crust). From there, it's easy to flavor it for whatever you're in the mood for. Just off the top of my head:
1. Garlic salt
2. Homefry spice mix
3. Cajun spice mix
4. Teriyaki sauce with a pineapple slice
5. Thousand Island dressing with caramelized onions on top
6. Honey mustard
7. Sweet BBQ sauce
8. Smokey BBQ sauce (more savory than sweet)
9. Prego sauce (red marinara in the glass jar, lots of flavors available)
10. Alfredo sauce (I'm dairy-free, so I make it out of either cashew cream, coconut cream, or cauliflower puree)
Sides are easy too:
1. Microwave a potato
2. Microwave a sweet potato
3. Cut a spaghetti squash in half & throw in the oven
4. Microwave frozen veggies in a bowl of water for 3 minutes to steam-boil (broccoli is easy)
That's like a two-dollar meal right there. Flavored chicken & starchy side, with enough variety to keep you from getting bored (Prego chicken & spaghetti squash, honey mustard chicken & a potato, Cajun chicken & a sweet potato, BBQ chicken & broccoli, Garlic chicken & mixed veggies, etc.). The trick is just to buy a truckload of chicken for your fridge (or freezer) & to have all of the other stuff on-hand in your pantry so you can easily cook whatever you're in the mood for in terms of chicken flavoring & sides.