2 tablespoons canola oil or peanut oil
2 tablespoons minced lemongrass (from bottom 3 inches of about 4 stalks)
2 garlic cloves, minced
4 ounces fresh shiitake mushrooms, stemmed, caps chopped
1 teaspoon coarse kosher salt, divided
1 3/4 pounds ground pork shoulder (Boston butt)
2 tablespoons soy sauce, divided
3 teaspoons Asian sesame oil, divided
3/4 teaspoon cracked black pepper
1/2 cup hoisin sauce*
1 tablespoon minced peeled fresh ginger
1 tablespoon unseasoned rice vinegar
1 teaspoon hot chili sauce (such as sriracha)*
Nonstick vegetable oil spray
2 heads of Bibb lettuce, cored, leaves separated
1 cup matchstick-size strips red bell pepper
1 cup matchstick-size strips peeled carrot
1/3 cup fresh cilantro leaves