In a medium bowl, whisk together eggs, milk, salt and black pepper.
In a small skillet, add butter and allow to melt and sizzle. Add the egg mixture and move the pan around to spread it out evenly. When the omelette begins to firm up, but is still lightly raw on top, sprinkle with Castello Tickler Mature Cheddar. Using a spatula, ease the edges of the omelette and fold over in half. When it begins to turn golden brown underneath, remove the pan from the heat and slide the omelette onto a plate. Sprinkle with herbs and serve with a green salad.