Fried rice is a really easy way to use leftover ... Sautee the onion until they are transparent. Add your peas and carrots to the onion mixture in the skillet and cook until they are thawed ...
For a quick meal, you can skip the pan-frying step - serve the rice after mixing in the stir-fried meats, shrimp and mushroom. But it's even better if the mixture is pan-fried, to give it a brown ...