Got one Yellow Onion (to taste) which is just diced up and a handful of shredded Ham (to taste). Cook them over a medium heat in lightly greased fry pan until the onions are lightly brown and ham is heated through.
Lightly grease a muffin pan with some spray Oil (to taste) and divide the ham and onion mixture between each of the holes.
Add Egg (8), Milk (1/4 cup), Oil (1/2 teaspoon) and Baking Powder (1/2 teaspoon) in a mixing jug. Season with some Salt and Pepper (to taste). Then whisk everything together.
Top the onion and ham mixture with a little bit Cheese (to taste), then divide the egg mixture between each of the holes.
Preheat the oven to 375 degrees F (190 degrees C).
Cook them for 20-25 minutes or just until they've golden and puffed up.
Leave them in the pan for 5 minutes.