For the roast, wash the thyme, shake dry and chop coarsely. Crush pepper coarsely. Mix both with sea salt and place in a flat roasting pan. Wash roast beef, dab dry. Heat 2 tablespoons of oil in a large frying pan. Fry the meat thoroughly all around. Place on the bed of salt and pepper. Roast in the preheated oven (electric cooker: 125 °C/circulating air: 100 °C/gas: see manufacturer) for approx. 1 1⁄2 hours.
For the onion remoulade, peel and finely dice the onions and garlic. Wash the rosemary, remove the needles and chop finely. Heat 2 tablespoons of oil. Fry the onions and garlic in it until transparent. Fry the rosemary briefly. Put everything in a bowl and let it cool down briefly. Stir in sour cream and honey and season to taste with salt and pepper.
Remove the roast beef and let it rest for about 10 minutes. Then cut into slices and serve with honey-rosemary remoulade. Antipasti vegetables taste good with it.
Prepare the roast beef the day before, then all you need to do the next day is cut it open.