Chop the onion. Cook onion, green chiles and ground beef until the beef is done. Drain as much fat as possible/needed. Add red enchilada sauce and season to taste. Heat refried beans in large pot. Using a can as a measuring cup, put 1" of water per can of beans into the pot as well (prevents scorching). Stir almost constantly over low heat. Chop tomatoes and lettuce. Put cheese and olives in individual serving bowls. Heat tortillas for serving.