Clean, wash and drain the carrots and kohlrabi. Cut carrots into slices, kohlrabi into slices. Wash the asparagus, peel the lower third and cut off the ends. Cut the asparagus into pieces.
Covered carrots and kohlrabi and stew in little boiling salted water for about 10 minutes. Add asparagus after about 5 minutes and cook. Pour vegetables onto a sieve, drain and collect vegetable water.
Wash the pork fillets, dab dry and cut into about 12 medallions. Wrap medallions with bacon. Heat oil in a large pan and fry the medallions until crispy, turning them over. Season with salt and pepper.
Put the vegetables and medallions in an ovenproof dish. For the sauce, measure 1/8 litre of cooled vegetable water and place in a small pot. Stir in the sauce powder and bring to the boil while stirring. Switch off the stove.
Cut the butter into pieces and embezzle. Stir in cream. Season sauce with pepper and spread over vegetables and medallions. Bake in the preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas: level 4) for 10-15 minutes.