1 Beat the eggs with a little pepper. Wash the tomato and the pepper, and cut them into very thin slices (seed them). To book.
2 Peel an onion and mince it. Brown it in a dish that is as good on the heat as it is in the oven, in olive oil, over low heat, so that it melts, coloring very gently. When the onion is cooked (about 7 to 8 minutes), lower the heat a little further and pour the eggs into the pan. With a spatula, regularly bring the eggs from the edge of the dish to the center.
3 Before the omelet is set (only the edges should have started to take consistency), remove it from the heat and place the slices of tomatoes and peppers, anchovies, olives, and sprinkle with grated mozzarella on top.
To finish
Place the omelet under the grill of the oven, previously heated, so that the cheese melts and browns lightly. Two minutes should be enough. The omelet will finish cooking and the vegetables will stay crisp.
