One of our fastest is beans and rice. Throw the beans in the crockpot in the morning, cook all day. Then, cook rice when it's supper time.
In the 20 minutes that it takes to cook the rice, I make whatever toppings we're going to have for the beans and rice. If it's pintos, I make pico and heat tortillas or chop an onion and make cornbread. If it's blackeyed peas, then I chop an onion and get out a jar of chow-chow. If it's red beans, then I cook up some smoked sausage. (We don't like meat in the crock-pot--too mushy) If it's black beans, then I chop an onion or make salsa. Easy. And, supper is done in 20 minutes.
We also like french dips int he crockpot. Cook a roast all day with 1/2 a jar of banana peppers (plus the juice), some Italian seasoning, and a can of beef broth. Take the roast out, shred it, put it on rolls, top with provolone, and run it under the broiler to melt the cheese. Serve all the juice from the crockpot on the side as dipping au jus.
Italian hamburger skillet. Basically, brown up some hamburger meat with an onion and garlic. Add a can of tomatoes (I use a quart of home-canned, but do what you like, depending on how tomatoey you like it, and how far you need to stretch it), then add cooked bow-tie pasta. Top with parm cheese. You can also make this with rice by draining the tomatoes, adding water to the tomato juice to make 2 cups, then adding the liquid nad 1 cup of uncooked rice to the hamburger. Cover, cook 20 minutes, then top with cheddar, and you have a hamburger rice skillet.
QUesadillas. This is our favorite use for leftovers.
Fried rice. This is the one we make when we have something with rice the night before. I make twice the amount of rice we need, then stick it in the fridge. I use peas nad carrots from the freezer, chop an onion or scallions, the leftover rice, sometimes leftover meat, sometimes scrambled eggs, and voila, supper in like 15 minutes.
Mini pizzas. English muffins, tomato paste for the sauce (spiced up a little), mozzarella, and any toppings we have (ranging from nothing to canned mushrooms to all fancy sundried tomatoes and basil to pepperoni. Whatever).