Preheat oven to 400 degrees F
Place the unthawed pie crust on a baking sheet. In a bowl, mix the bacon, onions and both cheeses. Pour this mixture into the crust.
Mix the eggs and half and half in a bowl. Pour this mixture over the cheese mixture.
Back in preheated oven for 15 minutes. Reduce the heat to 350 degrees F and back for an additional 305 minutes until the top of quiche turns golden.