Slice the onions finely and cook them together with Pomì organic chopped tomatoes, extra-virgin olive oil, salt and pepper until a soft and creamy consistency is obtained.
Now take 4 baking ramekins and fill them in order with: a slice of crispy bread, fontina cheese cubes, caramelized tomato onions and a sprinkling of Parmesan cheese.
Bake at 365°F for 20 minutes and serve.