Heat vegetable oil in a saucepan over medium-high heat.
1 tablespoon Vegetable oil
Add ground chicken and cook until browned, about 3-5 minutes, making sure to crumble the chicken as it cooks; drain excess fat.
1 pound Ground chicken
Stir in garlic, onion, hoisin sauce, soy sauce, rice wine vinegar, ginger, sesame oil, and sriracha until onions become translucent, about 2-3 minutes.
2 cloves Garlic, 1 small Onion, 1/4 cup Hoisin sauce, 2 tablespoons Soy sauce, 1 tablespoon Rice wine vinegar, 1 teaspoon Ginger, 2 teaspoon Sriracha, 1 tbsp Sesame oil
Stir in water chestnuts and green onions until tender, about 1-2 minutes; season with salt and pepper, to taste.
5 oz Water chestnuts, 3 - 4 Green onions, Kosher salt and freshly ground black pepper
To serve, spoon several tablespoons of the chicken mixture into the center of a lettuce leaf.
1 head butter lettuce