Quick, Easy Quiche
["1/2 c. mayonnaise", "2 Tbsp. flour", "2 eggs", "1/2 c. milk", "8 oz. diced Swiss cheese", "1/3 c. chopped onion", "1 (10 oz.) pkg. spinach, cooked and drained well (optional)", "1 c. finely chopped ham (optional)", "1 c. broccoli (optional)"]
["Heat oven to 350\u00b0.", "Mix everything in one bowl; stir.", "Pour into buttered glass pie dish.", "Bake for 40 to 45 minutes, or until edges are golden brown."]
["mayonnaise", "flour", "eggs", "milk", "Swiss cheese", "onion", "spinach", "ham", "broccoli"]