Potatoes Italiano - cooking recipe

Ingredients

4 large baking potatoes
1 tablespoon olive oil or 1 tablespoon vegetable oil
1/4 cup grated parmesan cheese
1 cup shredded mozzarella cheese
3 medium tomatoes, sliced
1 large onion, peeled and thinly sliced
1/2 teaspoon oregano
1/2 teaspoon salt
1/8 teaspoon pepper
2 tablespoons butter

Preparation

Preheat oven to 400.
Peel and slice potatoes in 1/4-inch slices.
Oil a 9 x 13-inch casserole dish.
Combine two cheese, reserving some for topping.
Arrange potatoes, tomatoes and onion slices in layers; sprinkle each layer with cheese and seasonings.
dot with butter and bake uncovered for 30 minutes.
Remove the potatoes from the oven and sprinkle with remaining cheese and bake for an additional 20 minutes.