Ingredients

• 1 onion, finely chopped
• 1 1/2 cups shredded Swiss cheese
• 6 slices diced cooked bacon
• 3 tablespoons all-purpose flour
• salt and ground black pepper to taste
• 2 pounds potatoes, peeled and thinly sliced
• 2 cups half-and-half, warmed

Instructions

1. Preheat oven to 350 degrees F (175 degrees C). Butter an 8-cup casserole dish.
2. Combine onion, Swiss cheese, bacon, flour, salt, and pepper in a bowl.
3. Spread 1/3 of the potatoes into the bottom of the prepared casserole dish and top with 1/3 of the cheese mixture. Repeat layering twice, ending with cheese mixture. Pour heated half-and-half over top layer. Cover dish with aluminum foil.
4. Bake in the preheated oven for 45 minutes. Remove foil and continue baking until potatoes are tender, 25 to 30 minutes.