Preheat oven to 375°F. Spray a pie dish with oil.

Place a large non-stick skillet over medium heat and sauté the bacon for 6-8 minutes until browned. Transfer to a plate. Discard excess oil keeping 2-3 tablespoons in the pan. Using the same pan, sauté the onion for 2 minutes until softened.

Meanwhile, grate potatoes on the large holes of a box grater. Use your hands to squeeze out as much water as you can from the potatoes. Then pat dry with paper towels.

Once onions are softened, add the grated potato to the skillet with the onions. Sauté for 7 minutes, stirring a few times until potatoes are golden and nearly cooked through. Remove from heat and let cool slightly.

Pour into the prepared pie dish. Sprinkle the top with bacon, then top with remaining cheese. Bake at 375°F for 40-45 minutes or until puffed and lightly browned and a toothpick inserted in the center comes out fairly clean. Cool for a few minutes before serving.