Crafting the perfect spinach and tomato omelet is a straightforward process. Follow these steps to achieve a fluffy, flavorful dish:

1. Prepare the Ingredients:
   • Begin by washing and chopping the spinach leaves. Dice the tomato and chop the onions. Grate the cheese if not pre-grated.
2. Beat the Eggs:
   • In a medium-sized bowl, crack the eggs and add the milk. Whisk them together until you achieve a smooth mixture. Season with salt and pepper.
3. Sauté the Vegetables:
   • Heat a non-stick skillet over medium heat. Add the olive oil or butter. Once heated, add the chopped onions and sauté until they turn translucent.
   • Add the diced tomatoes and cook for another 2 minutes, allowing them to soften.
4. Add the Spinach:
   • Stir in the fresh spinach leaves and cook until they wilt down, which should take about a minute.
5. Cook the Omelet:
   • Pour the beaten egg mixture over the sautéed vegetables. Let it cook undisturbed for a couple of minutes until the edges start to set.
6. Add Cheese:
   • Sprinkle the grated cheese evenly over the omelet. Cover the skillet with a lid to help the cheese melt and the top of the omelet to cook through.
7. Fold and Serve:
   • Once the cheese has melted and the omelet is fully cooked, use a spatula to carefully fold the omelet in half. Slide it onto a plate and serve hot.