Follow these steps to create a perfect Mediterranean Veggie Omelet:

1. Prepare the Ingredients: Gather all your ingredients. Crack the eggs into a bowl, add the milk, and whisk until well combined. Season with salt and pepper to taste.
2. Cook the Vegetables: Heat the olive oil in a non-stick skillet over medium heat. Add the diced bell peppers and cook until they begin to soften, about 3-4 minutes. Add the cherry tomatoes and olives, and cook for an additional 2 minutes.
3. Pour in the Eggs: Reduce the heat to low, then pour the egg mixture over the cooked vegetables. Use a spatula to gently stir the eggs, ensuring they cover the vegetables evenly.
4. Add the Cheese: Sprinkle the crumbled feta cheese over the top of the eggs. Cover the skillet with a lid and allow the omelet to cook until the eggs are set and the cheese has melted, about 5-7 minutes.
5. Garnish and Serve: Once cooked, remove the omelet from the heat. Sprinkle the chopped fresh parsley over the top. Carefully slide the omelet onto a serving plate, folding it in half if desired. Serve immediately.