Chicken Lettuce Wraps

Name: Chicken Lettuce Wraps
Ingredients: 1 lb boneless skinless chicken, diced (very small pieces); 2 tbsp sesame seed oil, divided; 1 can water chestnuts, drained; 1 tbsp ground ginger; 1 bell pepper, diced; 1 onion, diced; 2 tbsp rice vinegar; 2 tbsp teriyaki sauce, low sodium; 3 tbsp soy sauce, low sodium; 1/2 tsp garlic powder; 1/4 tsp red pepper; 1 bunch green onions, sliced; 1/2 cup shredded carrots; 1/4 cup pine nuts; 1-2 heads bibb lettuce