Lightly grease a 5 cup capacity pie dish and preheat your oven to 200 degrees.
Dice the bacon and finely chop the brown onion before placing into a frying pan and cooking for 5 minutes over a medium heat until the onion turns translucent and the bacon begins to brown.
Add the cooked bacon and onion to a bowl along with the grated cheese and flour and mix until all the ingredients are coated in flour before seasoning with a little salt and pepper.
Scatter these ingredients across the base of the pie dish.
In a large jug, whisk together the eggs and milk before carefully pouring it over the mixture in the pie dish and garnish with parsley.
Place the pie dish into the oven and cook for 40 minutes or until it’s risen and it golden on top.