339 calories; 20.3 g fat; 5.4 g saturated fat; 89.6 mg cholesterol; 173.5 mg sodium; 6 g carbohydrate; 1.1 g fiber; 2 g sugar; 32.2 g protein
Combine oil, Worcestershire, lime juice, garlic, cumin, chili powder, red pepper flakes, sugar, salt and pepper. Marinate flank steak for at least 2 hours, up to overnight (can be marinated ahead of time).
Preheat oven to 425°F.
Toss sliced peppers and onion with oil, salt, pepper and lime juice. Remove steak from marinade (discard any remaining marinade) and place it on a baking sheet with vegetables. Bake for 10–15 minutes, tossing halfway through. Remove pan from oven and turn broiler to high. Broil for 3–4 minutes.