Pine nuts and Dijon-style mustard bring a beautiful color to the outside of this tender roast. Paired with a fresh salad of fennel and radishes make this meal complete.
Preheat oven to 325°F. Combine pine nuts, 2 tablespoons parsley and 3 tablespoons mustard in small bowl. Spread mustard mixture onto all surfaces of beef Top Sirloin Petite Roast.
Place roast, fat-side up, on rack in shallow roasting pan. Insert ovenproof meat thermometer so tip is centered in thickest part of beef. Do not add water or cover. Roast in 325°F oven 60 to 75 minutes for medium rare to medium doneness.
Meanwhile, combine sour cream, remaining 2 tablespoons parsley and remaining 1 teaspoon mustard in large bowl. Add fennel and radishes, tossing to coat evenly. Season with salt and pepper, as desired.
Remove roast when meat thermometer registers 135°F for medium rare; 150°F for medium. Transfer roast to carving board; tent loosely with aluminum foil. Let stand 10 minutes. (Temperature will continue to rise about 10°F to reach 145°F for medium rare; 160°F for medium.)
Carve roast into slices. Season with salt and pepper, as desired. Serve with fennel-radish salad.
Test Kitchen Tips Place roasts on a rack in a toasting or broiler pan to allow fat to drip away during cooking.