Peel the shallot and garlic and chop very finely. Add mustard to the minced meat and knead well. Season with salt and pepper. Form about 30 balls from the minced meat. Wash, peel and chop the potatoes.
Wash, halve and slice the zucchini. Fry the meatballs in hot oil for about 5 minutes, turning, and remove. Fry potatoes in hot frying fat until golden brown, add zucchini and fry briefly.
Add stock, cream and milk, simmer for about 5 minutes. Stir in sauce thickener, bring to the boil again. Add meatballs and heat up in the sauce. Season with salt and pepper. Serve garnished with oregano as desired.