Fry the chicken fillet in hot oil on both sides, depending on the strength (if it seems too thick, cut through once beforehand), season with salt, pepper and place in a baking dish. Sauté the cleaned leek cut into rings in the remaining oil and add to the meat.
Mix the whipped cream with creme fraiche, tomato paste, curry, a little salt and pepper and pour over. Spread the grated cheese (e.g. Gouda) on top and bake in a preheated oven at 155 ° for about 15 minutes - the cheese should be well melted, but not brown.
Boiled potatoes or pasta and of course a salad taste great as a side dish.