If you have leftover pork, chicken or beef and leftover rice...
Make fried rice. Dice about a cup of leftover meat. Heat a tablespoon of canola oil in a wok or frying pan and add 2 beaten eggs and chopped scallions or onion; stir. When the eggs are lightly browned, mix in another tablespoon of oil, the meat, about 4 cups of rice (cold is better; it's firmer and contains less water than freshly cooked hot rice, so it crisps up) plus a cup of frozen peas, carrots or other vegetables. Cook 5 minutes; dress with soy sauce and cook a minute more.