Avocado Meat Loaf
["1 lb. hamburger", "1/2 c. bread crumbs", "1 egg", "1 Tbsp. catsup", "1 ripe avocado, cubed", "1/2 c. plain yogurt", "salt and pepper to taste"]
["Mix all ingredients.", "Put in loaf pan and bake at 350\u00b0 for 50 minutes.", "Remove from oven; put cheese slices on top and bake again for another 10 minutes.", "Serves 4."]
["hamburger", "bread crumbs", "egg", "catsup", "avocado", "plain yogurt", "salt"]