Bring 125 ml water and 1/2 teaspoon salt to the boil. Add milk and stir in puree powder. Put the puree aside. Peel onion and chop finely. Melt the fat in a pot. Sauté diced onion for 3-4 minutes, then remove. Wash the chervil, shake dry and chop the leaves of 5 stems
Mix minced meat, chervil, mustard and onion and season with salt, pepper and paprika. With moistened hands form approx. 12 small balls out of the minced mass. Coat the balls with mashed potatoes. Heat oil in a high pot
Whisk the eggs and season with salt and pepper. Turn the balls first in egg, then in breadcrumbs. Fry in hot oil (approx. 150°C) in portions for 8-10 minutes. Take out and drain on kitchen paper. Garnish balls with chervil and serve immediately