Peel the carrots and cut them into 2 cm long diagonal slices. Peel kohlrabi and dice in medium size. Clean the mushrooms, cut in half
Heat the oil in a frying pan. Fry the mushrooms for 8-10 minutes while turning. Blanch the carrots and kohlrabi in boiling salted water for about 4 minutes and let them drip off, collecting 1/4 liter of vegetable water. Heat the fat in a pot and sauté the flour in it until golden brown. Deglaze with white wine and vegetable water, stir in yeast stock and cream. Season with salt and pepper. Simmer for about 8 minutes in an open pot.
After 5 minutes add kohlrabi and carrots to the sauce and continue to simmer. Meanwhile cook macaroni in boiling salted water for about 10 minutes until al dente, drain. Add mushrooms to the vegetables. Wash basil, dab dry and chop finely, except for a little to garnish. Add to the sauce. Serve the ragout with the macaroni. Garnish with the rest of the basil and parsley