Korean Flat Iron Steak and Onion Lettuce Wraps

Ingredients

• 1 beef Flat Iron Steak (about 1 pound)
• 1 fennel bulb, thinly sliced (about 1 cup)
• 1 small cucumber, julienned (about 1 cup)
• 1/2 cup julienned daikon radish
• 1/2 cup shredded carrots
• 2 teaspoons sugar
• 1 teaspoon salt
• 1-1/4 cup distilled white vinegar
• 1 cup water
• 1/2 cup sugar
• 1 tablespoon salt
• 1/4 cup Korean red chile sauce (Gochujang)
• 1/4 cup honey
• 8 garlic cloves
• 1 tablespoon reduced-sodium soy sauce
• 2 teaspoons freshly ground black pepper
• 1/2 teaspoon sesame oil
• 1 cup sliced onion
• 6 tablespoons sugar
• 2 tablespoons fresh lime juice
• 1 to 2 tablespoons Korean red chili sauce (Gochujang)
• 1 tablespoon hoisin sauce
• 1 teaspoon minced garlic
• 1 head Bibb or Boston lettuce
• Torn fresh mint leaves, torn cilantro leaves, fried garlic, chopped peanuts, toasted sesame seeds, lime wedges (optional)