Éierkuch (Éierkuch)

Instructions

1. Fry the bacon in a non-stick pan over medium heat for 4 minutes, then add the sliced onion and let it turn golden for 3 minutes.
2. Beat the eggs with the crème fraîche, flour, salt and pepper until you have a smooth, lump-free mixture.
3. Pour the mixture over the bacon and onion, then dot the surface with small pieces of butter.
4. Cover and cook over low heat for 12 to 15 minutes, until the top is set but still slightly wobbly.
5. Sprinkle with chopped chives and Gruyère if using, then pass it under the grill for 2 minutes.
6. Cut into wedges and serve warm with salad.