2 lbs ground chicken (not ground chicken breast)
3 cloves garlic, minced
1 red bell pepper, cored and finely chopped
1/2 cup finely chopped yellow onion
1/2 cup hoisin sauce
2 Tbsp soy sauce
Salt and freshly ground black pepper
1 (8 oz) can sliced water chestnuts, drained and rinsed
1 1/2 cups cooked white or brown rice
3 green onions, sliced
1 Tbsp rice vinegar and 1 1/2 tsp sesame oil (optional)
2 heads iceberg lettuce