1)Preheat the oven 350 degrees. Take muffin pan heat it in medium flame. Fry bacon and onion. Until it becomes crunchy and crispy.
2)Take a bowl beat the egg. Stir it nicely. Add onion,cheese and bacon into it. Use spoon to fill it.
3) Cook in the oven for 10-15 min until it is light brown. Let cool it down for 5 min. Now you can have yummy quiche.