Wash the meat, dab dry and rub with salt and pepper. Tie meat into shape with kitchen string. Heat clarified butter in a roaster. Brown the meat thoroughly all around.
Deglaze with broth. Add bay leaf, rosemary and juniper and bring to the boil. Cover and braise in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 2 hours. Wash and clean the Brussels sprouts.
Cook the Brussels sprouts in boiling salted water for 18-20 minutes. Wash and halve apple and remove core. Cut apple quarters into small cubes. Fry deep-frozen croquettes in a little oil according to the instructions on the packet in a pan until crispy and keep warm.
Remove the roast from the oven, remove kitchen string and keep warm. Pour the roast stock through a sieve into a small pot and measure 250 ml (fill up with water if necessary). Stir in jelly, balsamic cream and apple cubes and let simmer for about 5 minutes.
Mix the starch and 3 tablespoons of water and stir into the sauce. Bring to the boil while stirring and simmer for about 1 minute. Season to taste with salt and pepper. Drain the sprouts. Melt butter until light brown and toss the sprouts in it.
Season to taste with salt, pepper and nutmeg. Cut the roast open. Serve roast with Brussels sprouts, croquettes and apple sauce.