Step 1

In a large bowl, combine soy sauce, scallions, garlic, ginger, sugar, pepper and 2 tablespoons oil and mix well. Add chicken and onions and toss to evenly coat. Let stand for 15 minutes.

Step 2

Heat a cast-iron griddle or grill pan over medium-high and lightly grease with oil. Toss mushrooms in remaining 1 tablespoon oil. Arrange half of the chicken, onions and mushrooms in a single layer. Grill until chicken is caramelized and cooked through, turning all ingredients every few minutes, 8 to 10 minutes. Transfer to serving plate. Repeat with remaining chicken and vegetables.

Step 3

Serve chicken bulgogi, onions and mushrooms with lettuce leaves for wrapping. Fill lettuce cups with rice (if using), chicken and vegetables. Top with any combination of kimchi, gochujang and sesame oil. Wrap and enjoy.