Cheeseburger Pie
["2 medium onions, chopped", "1 lb. ground beef", "1/4 tsp. pepper", "1 tsp. salt", "1 1/2 c. milk", "3 eggs", "3/4 c. baking mix (Bisquick)", "1 c. shredded cheese (Cheddar or Mozzarella)"]
["Brown ground beef with onions and seasonings.", "Drain.", "Spread in a greased baking dish.", "Blend milk, eggs and baking mix together and pour over beef.", "Bake at 400\u00b0 for 25 minutes. Sprinkle with shredded cheese.", "Bake 5 to 8 minutes more until knife inserted in center comes out clean.", "Cool 5 minutes on wire rack."]
["onions", "ground beef", "pepper", "salt", "milk", "eggs", "baking mix (", "shredded cheese"]