Chile Rellenos Casserole
["1 lb. ground beef", "1/2 c. chopped onion", "1/2 tsp. salt", "1/4 tsp. pepper", "2 (4 oz.) cans green chiles, cut in halves crosswise and seeded", "1 1/2 c. shredded sharp Cheddar cheese", "1/4 c. flour", "1/2 tsp. salt", "1 1/2 c. milk", "1/4 tsp. bottled hot pepper sauce"]
["Brown meat and onion together. Layer chiles, cheese, meat and chiles in a 9 x 13-inch pan.", "Mix together flour, salt, eggs, milk and hot pepper sauce.", "Pour over.", "Bake at 350\u00b0 for 45 to 50 minutes.", "Cool before cutting."]
["ground beef", "onion", "salt", "pepper", "green chiles", "Cheddar cheese", "flour", "salt", "milk", "pepper sauce"]