Cashew Chicken Lettuce Wraps

Name: Cashew Chicken Lettuce Wraps
Ingredients: 2 tablespoons canola oil, divided; ½ cup sliced scallions, plus more for garnish; ¼ cup sliced shallot; 2 tablespoons grated fresh ginger; 2 pounds ground chicken or turkey; ¾ cup unsalted cashews or peanuts, toasted; ½ cup thinly sliced celery; ½ cup no-salt-added chicken broth; 1 tablespoon cornstarch; 2 tablespoons lime juice, plus lime wedges for serving; 2 tablespoons brown sugar; 2 tablespoons chile-garlic sauce; 2 tablespoons 50%-less-sodium tamari; 1 tablespoon toasted sesame oil; 16 leaves Boston or Bibb lettuce; Toasted sesame seeds & thinly sliced bird's eye chiles for garnish