Roast beef with mashed potatoes

Anyone who has never prepared a roast beef roast faces a difficult task. Because the expensive roast beef must succeed. But it's quite simple if you stick to the core temperature. Because it must not be overcooked. It becomes dry. This is an absolutely simple recipe. Roast beef is a high-quality rib section (entre côte) from beef.   To achieve a good result, roast the roast beef pink. You get this with a core temperature of 56°. To get this temperature, put the roast in the oven. After roasting l...