Peel and wash the potatoes. Cook in salted water for about 20 minutes. Soak toast. Peel and finely dice onions. Wash and chop parsley.
Knead the minced meat, pressed bread, onions, tomato paste, 1 teaspoon each of sweet and hot mustard, parsley, salt and pepper. Form 8 meatballs with moistened hands. Wrap with bacon
Grease the casserole dish. Drain the potatoes. Add 1/8 l milk and 2 tablespoons fat, mash finely. Season to taste with salt and nutmeg. If necessary fill into a piping bag (large star-shaped spout). Spray the puree onto the edge of the mould or fill in with a spoon
Fry the meatballs in hot oil for 5-6 minutes per side. Place in the pan. Drain the frying fat. Stir 200 ml water, 100 ml milk, 100 g cream and stock into the pan. Bring to the boil and simmer briefly. Bind lightly with sauce thickener. Season to taste with salt, pepper and the remaining mustard
Spread the puree with 3 tablespoons of cream. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 15 minutes
Clean broccoli, wash it, cut it into florets. Cover and steam in little boiling salted water for about 6 minutes. Drain. Serve with the meatballs in the puree rim and sauce