Beef Lettuce Wraps

Ingredients

• Cooking spray
• 1 (1-pound) flank steak, trimmed
• 1/4 teaspoon kosher salt
• 1/4 teaspoon freshly ground black pepper
• 3 tablespoons fresh lime juice
• 2 tablespoons fish sauce
• 4 teaspoons dark brown sugar
• 1 jalapeno pepper, seeded and minced
• 8 Bibb lettuce leaves
• 1 cup thinly sliced red onion
• 1 cup torn fresh mint
• 1/2 cup matchstick-cut English cucumber
• 1/2 cup torn fresh cilantro
• 2 tablespoons chopped unsalted, dry-roasted peanuts