Lentil Sloppy Joe Lettuce Wraps

Name: Lentil Sloppy Joe Lettuce Wraps
Ingredients: 1 tablespoon olive oil; 1 red or green bell pepper, finely chopped; 2 garlic cloves, minced; 1 large shallot, minced; 2 tablespoons tomato paste; 1 bay leaf; 8 ounces tomato sauce; 1-1/2 cups water; 1 cup red lentils, rinsed; 2 tablespoons Worcestershire sauce; 1 tablespoon yellow mustard; 2 teaspoons apple cider vinegar; 2 teaspoons brown sugar; 1-1/2 teaspoons chili powder; 1/2 teaspoon ground black pepper; 1/2 teaspoon kosher salt; 1/4 teaspoon cayenne pepper; 8 large iceberg lettuce leaves