Break the eggs into a bowl with a good pinch of salt and a twist or two of pepper, then whisk with a fork. Place a small, nonstick saucepan on a low heat and melt half the butter. When it starts to bubble, pour in the eggy mixture and start stirring. Half the roll. As the egg mixture gets hotter, it will thicken into soft lumps. When you get close to the texture you like, switch off heat and stir in remaining butter and garlic leaves. Butter the roll and spoon/pour the eggs over. Serve at once.