Spicy Pineapple Beef Lettuce Wraps

Name: Spicy Pineapple Beef Lettuce Wraps
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: Asian
Ingredients: 2-3 tablespoons vegetable oil; 6 scallions, sliced lengthwise into strips; 1 red pepper, cored and sliced into strips; 1 carrot, peeled and sliced into strips; 1-2 heads butter lettuce, leaves separated; Sesame seeds, for garnish; 1 cup fresh pineapple, peeled and cubed; 1/4 cup soy sauce; 1/4 cup molasses; 2 tablespoons apple cider vinegar; 2 tablespoons Sriracha; 1 tablespoon ketchup; 4 garlic cloves, peeled; 1/2-inch piece fresh ginger, peeled; About 1 lb sirloin steak, sliced into strips