Preheat a camp oven to 355 degrees F (180 degrees C).
Dice the onion and bacon into small pieces.
Whisk the eggs in a bowl until flowing smoothly.
Stir the onion and bacon in with the whisked eggs.
Gently lay the puff pastry into the camp plate.Tip: Typically, puff pastry has enough flour on it so it doesn't stick. If your puff pastry is moist, flour or grease the plate so it doesn't stick.
Place the pie in the oven and bake for 25 minutes or until browning and the egg is set all the way through.
The bacon and egg pie can be eaten hot with a side or cold as a lunch.