First, you have to heat the oven at 180 degrees C. The next thing you have to take care of are the vegetables. So, you have to slice the mushrooms, peel the onion and chop it into small pieces. After that, obviously, you have to fry them in the olive oil in a pan. Then, prepare the mixture by beating the eggs and mixing them with milk and herbs. Next, you have to add some salt and pepper. Next, pour the entire mixture in a baking mold and add the vegetables you have already prepared. Finally, you have to bake the omelette for about 30 minutes until it is golden brown.
