For the filling: add some oil in hot pan, cook the cubed bacon for 3 minutes. Add in leek, season with salt and pepper. Cook until leek is softened, set aside.

Add the filling into pie shell, add in cheese.

In a bowl, mix eggs and cream together, season with 1 tsp of salt and 1/4 tsp black pepper. Pour the mixture into the pie shell and sprinkle more cheese on top.

Pop in preheated oven at 160C, bake for 35-40 minutes or until the top is set and golden.