Clean the leek, wash it and cut into thin rings. Whisk eggs, season with salt and pepper. Heat the oil in 2 frying pans. Spread the leeks and stew for about 4 minutes at medium heat. Add ham and spaetzle and fry over high heat.
Melt some butter in each pan. Pour whisked eggs over them and season with pepper. Let it simmer again at a lower heat for about 5 minutes. Serve with sliced gherkin