Copycat Chicken Lettuce Wraps

Ingredients

• 3 tablespoons hoisin sauce, plus more, to taste
• 2 tablespoons soy sauce
• 2 tablespoons rice vinegar
• 1 teaspoon toasted sesame oil
• 1 teaspoon cornstarch, optional
• 2 teaspoons vegetable oil, divided
• 1 pound ground chicken
• 1 (8-ounce) carton white button or cremini mushrooms, finely chopped
• onions, optional, to taste, finely diced,
• bell peppers, optional, to taste, finely diced
• carrots, optional, to taste, grated or finely diced
• 1 (8-ounce) can water chestnuts, drained and finely chopped
• 3 cloves garlic, minced
• 1 tablespoon ginger, peeled and minced
• 1/2 cup scallions, thinly sliced, divided
• 2 small heads butter lettuce, leaves separated, rinsed and dried
• red pepper flakes or hot sauce, optional, to taste, for serving