Chilies Rellenos
["6 large green chilies, roasted and peeled", "1/2 lb. cheese, shredded", "6 eggs, separated", "1/2 tsp. salt", "flour", "oil for frying", "1 medium onion, chopped (optional)", "shredded beef (optional)"]
["Cut chilies down the middle, open up and fill each with cheese (and beef and onions, if desired).", "Dust with flour and set aside. Beat egg whites until stiff.", "Fold in 1 teaspoon flour and salt to taste.", "Add egg yolks.", "Heat oil in a skillet.", "Dip chilies one at a time in egg mixture and place in skillet.", "Turn and cook until golden brown on both sides.", "Serve immediately."]
["green chilies", "cheese", "eggs", "salt", "flour", "oil", "onion", "beef"]