Wash the meat and pat dry. Mix mustard, rum, cola, chili. Pour everything into a freezer bag, seal well. Marinate overnight.
Dab meat dry (keep marinade), season with salt and pepper. Roast on an oiled fat pan in a hot oven (electric cooker: 175-200 °C/circulating air: 150-175 °C/gas: level 2-3) for approx. 1 1/2 hours. Pour on the stock little by little
Clean and wash the fresh corn and boil in water (without salt) for about 20 minutes. Cut into thick slices
Clean, wash and chop the peppers and mushrooms. Wash and quarter the potatoes. Spread potatoes around the meat after about 45 minutes and season. Turn more often
Measure out a good 1/8 l marinade. Add the vegetables to the meat after about 1 hour. Mix 2 tablespoons mustard, honey and sugar. Brush the meat with it and fry it until done. Turn vegetables more often