For the potatoes, peel and finely chop the onions. Wash parsley and chop finely, except for a few leaves for garnishing. Stir the prepared ingredients, parmesan and croquette powder into 375 ml cold water and leave to swell for about 10 minutes.
Knead the material and form into 12 slices. Shortly before serving, bake in hot vegetable fat for about 3 minutes until golden brown. Clean, wash and cut the beans into bite-sized pieces. Cook in boiling salted water for about 17 minutes.
Wash the tomatoes, cut into slices and remove the seeds. Wash medallions, dab dry, wrap with bacon and pin with wooden sticks. Fry in hot oil on each side for 3-5 minutes, season with salt and pepper and remove.
Steam the tomatoes in the frying fat for 2 minutes. Add the beans. Deglaze with 1/8 litre water, stir in gravy. Serve everything garnished with parsley.