Ingredients for 4 servings:
600gr potatoes
400gr onions
400gr ripe tomatoes
Olive oil
Grated roman cheese
Grated bread
Oregano
Salt

Preparation:
Greased a medium oven-pan with oil and arrange the first level of peeled and sliced potatoes.

Add salt and season with oil.

Arrange the second layer of slices onions, and the third of sliced tomatoes, season each layer with oil and salt.

Cover the last layer with grated bread, oregano and roman cheese, a bit of oil and bake for 1 hour in 200°C oven.