This is for one person; just increase the amounts for any number of people.

4ozs of cheddar cheese (or one you like more)
2 fresh eggs
Knob of butter
Pinch of mustard (or half teaspoon made mustard).
2 slices of bread, thick cut...white or brown to taste.
1 teaspoon of milk.

Grate the cheese and place in a pan with the milk, butter and mustard on a low heat and stir.

Separate the eggs and whisk the whites until they are fluffy and form peaks.

Once the cheese mixture in the pan is semi-liquid add the egg yolks, turn up the heat a little and stir until cooked...just a few minutes.

Remove pan from heat and fold in the egg whites until completely mixed. Return the pan to the heat, and stir until all ingredients are blended and cooked. Remove the pan from the heat, put the bread to toast and turn the grill to high.

Then just spread the mixture on to the prepared toast and place under the grill to brown the top.  Delicious.