Heat olive oil in a large pot and sauté onion for about 2 minutes until almost soft.
Add garlic and ginger and cook for 1 minute, then add ground chicken.
Cook chicken until almost done while preparing the sauce.
Whisk together sesame oil, sriracha, rice vinegar, soy sauce, and honey in a bowl.
Add sauce to the chicken and stir to combine.
Reduce heat, add green onions and water chestnuts, and cook 4–5 minutes until sauce thickens.
Wash and dry lettuce leaves and trim if needed.
Spoon about ¼ cup chicken mixture into each lettuce leaf and add toppings as desired.
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