Roast Beef with Wholegrain Mustard is a classic and flavorful dish that is perfect for a special occasion or Sunday roast. The beef is seasoned with salt, pepper, and wholegrain mustard, then roasted to perfection. The result is a tender and juicy roast beef with a deliciously tangy and slightly spicy crust. Serve it with roasted vegetables and gravy for a complete and satisfying meal.