Heat the oil in a nonstick frying pan, cook the courgettes until tender and set aside keeping them warm.
Beat the eggs and season with pepper. Heat the butter in a small nonstick frying pan, pour in the egg mixture and cook over a high heat, stirring until the egg is three-quarters set. Leave to cook for another 30 seconds without stirring.
Scatter over the grated cheese, courgettes and parsley. Flip over one-third and slide onto a plate. Fold over again and serve with a nice crispy salad.