Spiced Roast With Dijon Sauce
["1/2 tsp. fennel seed", "1/2 tsp. whole black pepper", "1 (2 1/2 lb.) boneless beef round rump roast", "1 c. sliced fresh mushrooms", "1 Tbsp. margarine or butter", "2 Tbsp. all-purpose flour", "1/4 tsp. salt", "1 c. milk", "2 Tbsp. coarse grain brown mustard", "1 tsp. snipped chives"]
["Using a mortar and pestle, crush the fennel seed, mustard seed and pepper.", "Set aside."]
["fennel seed", "black pepper", "beef round rump roast", "mushrooms", "margarine", "flour", "salt", "milk", "coarse grain brown mustard", "chives"]