Peel and chop the onions. Wash and drain the millet. Heat 1 tsp. oil. Fry half of the onions until translucent. Add millet and deglaze with 1/2 l water. Bring to the boil and stir in 2 tsp. stock. Cook on low heat for 20-25 minutes. Cool down and drain if necessary
Peel the black salsifies under water, wash them and immediately place them in vinegar water. Clean, wash and possibly halve the Brussels sprouts. Peel, wash and chop the turnip
Heat 1 tsp. oil. Brown the rest of the onions and rutabaga in it. Deglaze with 1/4 l water. Bring to the boil and stir in 1 tsp. stock. Drain black salsify and chop. Add with the Brussels sprouts. Steam everything covered for about 15 minutes
Knead the millet and egg. Season. Form approx. 20 croquettes from it. Fry all around in 2-3 tablespoons of hot oil until golden brown
Add the cream to the vegetables and let it boil down a little. Bind easily and season to taste. Arrange everything