Peel and chop the onion. Wash the sprouts and let them drip off. Wash chives and parsley, chop finely. Wash, quarter, seed and finely dice the tomato
Mix the quark and crème fraîche, season to taste. Stir in 3/4 onion, sprouts, herbs and tomato
Spread bread with butter and sprout quark and cut in half
Arrange one half of the bread on a salad leaf. With the rest
Sprinkle onion, sprouts, herbs and tomato