- 1 1 1/2-pound beef flank steak, trimmed
- 2 large red bell peppers
- 6 tablespoons olive oil
- 1/4 cup red wine vinegar
- 1 tablespoon minced garlic
- 1 1/4 teaspoons dry mustard
- 2 cups chopped watercress
- 1 1/4 cups chopped red onion
- 1 cup cherry tomatoes, halved
- Prepare barbecue (medium-high heat) or preheat broiler. Sprinkle steak with salt and pepper. Grill about 5 minutes per side for medium-rare. Cool. Halve steak lengthwise. Slice across grain into thin strips.
- Meanwhile, char peppers on barbecue, over gas flame or in broiler until blackened on all sides. Enclose in paper bag; let stand 10 minutes. Peel and seed peppers. Cut into thin strips. Halve strips crosswise.
- Whisk oil, vinegar, garlic and dry mustard in large bowl to blend. Add steak, roasted peppers, watercress and onion; toss to combine. Season with salt and pepper. Chill at least 2 hours or up to 8 hours. Mix in tomatoes and serve.