Gather all ingredients and utensils.
In a bowl, whisk the eggs with milk, salt, and pepper until combined.
Heat a non-stick skillet over medium heat and add butter or oil.
Pour the egg mixture into the skillet, tilting to distribute evenly.
As the edges start to set, gently lift them with a spatula.
Add cheese, vegetables, and herbs to one half of the omelette.
When the bottom is golden and the top is slightly runny, fold the omelette in half.
Cook for another minute until the cheese melts.
Slide the omelette onto a plate and garnish with additional herbs.
Serve immediately and enjoy your delicious omelette!