Soak rolls in water. Clean and wash the cauliflower. Clean the carrots, leaving a little green, peel and wash. Clean and wash broccoli and cut into florets. Cook the cauliflower in boiling salted water for 20-25 minutes. Cook carrots in boiling salted water for 15-20 minutes.
Add broccoli 8 minutes before the end of cooking time and cook. In the meantime, squeeze the rolls well and put them in a bowl together with the minced meat. Peel and finely dice the onion. Add to the mince, season with mustard, salt and pepper and knead well. Form 8 flat minced medallions and wrap each with a slice of bacon. Heat oil in a pan and fry the bacon medallions in it for 12-15 minutes. Drain the carrots and broccoli. Remove the cauliflower from the cooking water. Measure 300 ml vegetable water. Heat the fat in a saucepan. Dust with flour and let it sweat on. While stirring, deglaze with vegetable water and milk and bring to the boil.
Drain the carrots and broccoli. Remove the cauliflower from the cooking water. Measure 300 ml vegetable water. Heat the fat in a saucepan. Dust with flour and let it sweat on. While stirring, deglaze with vegetable water and milk and bring to the boil. Simmer at low heat for about 5 minutes while stirring. Remove sauce from the stove. Mix the egg yolks and 3-4 tablespoons of sauce and stir into the sauce. Season to taste with salt, sugar, nutmeg and lemon juice. Arrange vegetables and meatballs on a plate. Spread the sauce over the vegetables and serve sprinkled with chervil as desired
Simmer at low heat for about 5 minutes while stirring. Remove sauce from the stove. Mix the egg yolks and 3-4 tablespoons of sauce and stir into the sauce. Season to taste with salt, sugar, nutmeg and lemon juice. Arrange vegetables and meatballs on a plate. Spread the sauce over the vegetables and serve sprinkled with chervil as desired