This is one of my favorite quick go-to meals and I try to keep all the ingredients on hand.
Rubber Burritos

You need -
salsa
rice
refried beans
chili beans
green chilis
Bring a cup of salsa to a boil and add a cup of instant rice, then cover it until the rice is cooked. Mix in the other ingredients and you're done.
That was hard, huh? (actually I usually toss in garlic, cumin, chili powder, taco seasoning, etc. too.)
What I actually love about this is how versatile it is.
If I have corn, I add it in.
Canned tomatoes? Sure, toss them in.
Cooked hamburger or pulled pork? MmmHmmm.
Roll it in tortillas with cheese, guacolome, and sour cream for burritos.
Serve it over shredded lettuce and crushed tortilla chips for a taco salad.
If you have just a small amount of this leftover, you can mix it with melted velveeta and have a dip for chips.
You can stretch this recipe to feed TONS of people if needed. Just keep adding ingredients! Add more beans. Add more rice. Add more veggies. Whatever.
Yes, I shop at WalMart and yes I buy store brands. Like I said, I'm cheap and easy.