In a non-stick frying pan, melt the butter over a high heat tilting the melted butter so that it covers the whole pan.
Turn the heat down to medium and pour the eggs into the pan and leave for a few mins to set.
If the eggs start to bubble in the middle, gently slit down the middle to let the remaining egg seep through and tilt the pan to spread any remaining egg around the edges. It doesn't need to be fully cooked.
When the egg is nearly cooked, add the grated cheese to half side of the omelette and with a spatula carefully flip the other half of the omelette over the cheese to create a half moon.
Cook for a few extra mins and the flip the omelette over to cook on the other side.
Serve immediately with some chips, salad or simply some tomato ketchup.
