Cut the ham into small cubes. Heat oil in a pan and fry ham cubes crisply. Drain on kitchen paper. Put some ham aside for garnishing. Peel and wash the carrots.
Cut into small cubes. Blanch in boiling salted water for 3-4 minutes. Drain and let drain. Clean, wash and cut spring onions into rings. Wash parsley and chives, dab dry.
Cut chives into rings, chop parsley. Put something aside for garnishing. Mix quark and sour cream. Stir the herbs, carrots, spring onions and ham into the quark. Season to taste with salt and pepper.
For the bread, peel the garlic and dice finely. Heat the fat in a large pan and toast the bread together with the garlic, turning once. Sprinkle half of the herbs set aside over it and fry briefly.
Cut the slices of bread in half and serve with the quark. Sprinkle with remaining herbs and ham.