Your guests don't have to know how easy this recipe is. Beef Tri-Tip Roast is accompanied by Dijon-style mustard, herbs, cabbage and tart cranberries for a one-pan dinner that's delicious and easy to clean.
Preheat oven to 425°F. Combine mustard, steak seasoning and rosemary in small bowl. Rub evenly onto all surfaces of beef roast.
Line sheet pan with parchment paper. Add cabbage and cranberries to the sheet pan. Toss with oil, salt and pepper. Place roast on bed of cabbage and cranberries. Do not add water or cover. Insert ovenproof meat thermometer so tip is centered in thickest part of beef. Roast in 425°F oven for 1 hour, 10 minutes for medium rare, 1 hour, 20 minutes for medium doneness.
Remove roast when thermometer registers 135°F for medium rare; 150°F for medium. Transfer roast to carving board; tent loosely with aluminum foil. Let stand 15 minutes. (Temperature will continue to rise about 10°F to reach 145°F for medium rare; 160°F for medium.)
Carve roast across the grain into thin slices; season with salt and pepper, as desired. Serve with roasted cabbage and cranberries.
Garnish roast and cabbage mixture with balsamic syrup or cranberry sauce.