Ingredients:3 large eggs2 tablespoons milk (optional)Salt and pepper to taste1 tablespoon butter or oilFillings of your choice (e.g., cheese, diced ham, bell peppers, onions, mushrooms, spinach, tomatoes)Crack the eggs into a bowl. Add the milk (if using), salt, and pepper.Beat the mixture with a fork or whisk until well combined.Prepare your fillings: grate cheese, chop vegetables, and cook any meats if necessary.Cook the Omelet:Heat a non-stick skillet over medium heat and add the butter or oil.Once the butter is melted and sizzling (but not brown), pour in the egg mixture.Cook and Add Fillings:Let the eggs cook undisturbed for about 1-2 minutes until they start to set around the edges.Use a spatula to gently lift the edges of the omelet, allowing the uncooked eggs to flow underneath.When the eggs are mostly set but still slightly runny on top, add your desired fillings to one half of the omelet.Fold and Serve:Carefully fold the omelet in half over the fillings.Let it cook for another 1-2 minutes until the eggs are fully set and the cheese (if using) is melted.Slide the omelet onto a plate and serve immediately.