In a small bowl, whisk together soy sauce, hoisin sauce, rice vinegar, honey, and sesame oil. Set aside.
Place a large nonstick skillet over medium heat. Add olive oil.
Add ground chicken and onion to the skillet. Cook for 5–6 minutes, using a wooden spoon to break the chicken into small pieces, until chicken is no longer pink.
Stir in garlic, ginger, water chestnuts, salt, and pepper. Cook for 1–2 minutes, stirring often.
Pour the sauce into the skillet. Stir until the chicken is coated. Cook for 2–3 minutes until the sauce thickens and the mixture looks glossy. Remove from heat.
Arrange lettuce leaves on a serving platter.
Spoon the warm chicken mixture into the center of each lettuce leaf. Sprinkle with sesame seeds if using. Serve right away.
Notes
Tips and Tricks
Sauce - Mix the sauce in a small bowl before you start cooking so it’s ready when you need it.Serving - Lay out the lettuce leaves and chicken filling separately if you’re serving a group, so everyone can build their own wraps.Leftovers - Store leftover chicken filling in an airtight container in the fridge and assemble wraps just before serving to keep the lettuce crisp.
Storing and Reheating
Reheat on Stovetop – Place the chicken filling in a saucepan with 1 to 2 tablespoons of water. Warm over low heat, stirring until heated through. Store - Store lettuce leaves and chicken filling separately in the refrigerator for up to 3 days. Assemble wraps right before serving to keep them fresh.