Jalapeño Cheeseburgers with Bacon and Grilled Onions

Name: Jalapeño Cheeseburgers with Bacon and Grilled Onions
Ingredients: 1 cup mayonnaise; 1 cup sour cream; 1/2 cup chopped fresh cilantro; 6 tablespoons fresh lime juice; 4 green onions, finely chopped; 2 tablespoons minced seeded jalapeño chile; 1/2 teaspoon cayenne pepper; 2 pounds ground beef; 1 small onion, chopped (about 1 1/4 cups); 1/4 cup chopped fresh parsley; 2 tablespoons Worcestershire sauce; 1 tablespoon chopped seeded jalapeño chile; 1 teaspoon salt; 1 teaspoon ground black pepper; 1/4 teaspoon cayenne pepper; 1/3 cup light corn syrup; 2 tablespoons ketchup; 1 teaspoon instant coffee crystals; 2 teaspoons (packed) golden brown sugar; 3 tablespoons butter; 16 bacon slices; Nonstick vegetable oil spray; 8 hamburger buns or 3- to 4-inch square focaccia rolls, split horizontally; 8 lettuce leaves; 2 cups coarsely shredded sharp white cheddar cheese; Assorted additional toppings (such as tomato and grilled onion slices)