- Heat olive oil over medium heat in a large skillet. Add mushrooms and bell pepper. Sauté for 8-10 minutes until vegetables are tender.
- Stir in water chestnuts, green onion, cashews and ⅓ cup Takumi sauce. Cook 2 minutes longer.
- Remove full leaves of lettuce from the head of lettuce. Spoon a few tablespoons of brown rice into each lettuce wrap and top with sautéed mushroom mixture. Garnish with fresh cilantro. Drizzle with additional Takumi sauce if desired.