Trim fat from steak. Score both sides of steak in a diamond pattern, making shallow diagonal cuts at 1-inch intervals. Sprinkle steak with salt, pepper and lime peel. Wrap in plastic wrap and chill 1 hour.
Meanwhile, preheat a large cast-iron skillet next to steak directly over medium coals. Add sausage; cook, stirring occasionally for 3 minutes. Add onion, sweet pepper, and garlic. Cook, stirring occasionally, for 8 to 10 minutes more or until vegetables are crisp-tender. Stir in cilantro and vinegar. Remove from heat.
Thinly slice steak to serve; spoon pepper mixture atop. Makes 6 to 8 servings.