Clean, wash and cut the leek into rings. Peel and finely chop the onion. Heat 1 tablespoon of oil in a large frying pan. Fry the minced meat in it in portions until crumbly. Fry the onion briefly. Sweat on tomato paste. Season with salt and pepper and take out. Heat 1 tbsp. oil in the frying fat. Steam the leek in it for about 5 minutes, season
Mix leek and minced meat and pour into an oiled casserole dish. Whisk eggs, milk and mustard. Season with salt and pepper and pour over the mince. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for about 30 minutes. Serve with a dash of crème fraîche and a crisp salad
Drink: cold beer