Whisk the egg with the grated courgette, garlic and ½ tsp salt.
Cut the tomatoes in half, the spring onions into small bits.
Slice the cheese.
Heat a drop of oil in anon-stick frying pan, then pour in the egg mixture. Scatter the spring onions, olives and tomatoes on top. When the surface is almost solid lay the cheese on top.
Put a lid on and stem for 3/5 minutes or until the cheese has melted. Alternatively, put the pan in the oven, under the grill for a couple of minutes.
Serve warm with salad or at room teperature.