Cindy'S Chile Rellenos
["1 lb. ground beef", "1 small onion, diced (optional)", "2 (4.5 oz.) cans green chiles, diced or whole, peeled", "4 eggs", "1/4 c. flour", "2 c. milk", "1 pkg. (2 c.) natural shredded sharp Cheddar cheese", "salt and pepper to taste"]
["Brown ground beef with onion.", "Drain grease.", "Set aside. Spread chiles on bottom of dish, approximately 10 x 10-inch. Cover with ground beef and onion mixture.", "Sprinkle cheese over chile and hamburger mixture."]
["ground beef", "onion", "green chiles", "eggs", "flour", "milk", "Cheddar cheese", "salt"]