Preparation

• Heat oven to 375°F. Line 9x5-inch loaf pan with foil, with ends of foil extending over sides; spray with cooking spray.
• Crush 36 crackers finely; set aside. Combine ketchup and tomato sauce.
• Combine all remaining ingredients except pepper Jack cheese pieces in large bowl. Add cracker crumbs and 1/3 cup ketchup mixture; mix just until blended. Press onto bottom of prepared pan.
• Reserve 2 Tbsp. of the remaining ketchup mixture for later use; brush remaining ketchup mixture onto meatloaf.
• Bake 45 min. or until done (160°F). Cool slightly. Meanwhile, reduce oven temperature to 350°F.
• Use foil handles to remove meatloaf from pan. Cut meatloaf into 10 slices, then cut each slice into thirds.
• Place remaining crackers in single layer on baking sheet. Place meatloaf pieces on 30 crackers; brush with reserved ketchup mixture. Cover remaining crackers with cheese pieces.
• Bake 5 min. or until cheese is melted. Cover meat-topped crackers with cheese-topped crackers, cheese sides down, to make 30 sandwiches. Serve warm.