Chang's Lettuce Wraps

Ingredients

• 1 tbsp olive oil
• 1 lb ground chicken
• 2 cloves garlic, minced
• 1 onion, diced
• 1/4 cup hoisin sauce
• 2 tbsp soy sauce
• 1 tbsp rice wine vinegar
• 1 tbsp freshly grated ginger
• 1/4 tsp pepper
• salt to taste
• 1 can (8 oz) water chestnuts, drained and diced
• 1 head of romaine lettuce leaves