3 eggs,  1 & 1/2 cup milk, 1 tbsp oil, 1 cup grated cheese, 1/2 cup self- raising flour, 1 chopped onion, plus other fillings you choose eg peppers, bacon, ham,  spinach & mushrooms.

Beat the eggs, put all the ingredients in a large mixing bowl, put a lid on it and give it a good shake.

Put into a greased oven dish. Bake for 1/2  hour 180C.