Wash the meat and dab dry. Rub with salt and pepper. Place on the fat pan of the oven. Heat clarified butter and pour it over the meat. Bake in the preheated oven (electric: 175 °C/ gas: level 2) for approx. 1 1/4 hours.
In the meantime, finely chop the peanuts for the crust. Peel garlic and press it through a garlic press. Mix with breadcrumbs. Spread the crust on the roast after 1 hour frying time. Add 1 tablespoon of fat in flakes and cook the roast for another 15 minutes.
Peel and wash the vegetables. Cut kohlrabi into slices and halve potatoes. Cook both in boiling salted water for about 12 minutes and drain. In the meantime, also cut tomatoes into slices.
Wash and chop the coriander. Heat the remaining fat. Sauté the coriander, tomatoes, kohlrabi and potatoes. Cut the roast open and arrange with the vegetables. Serve garnished with coriander.