Recipe Keeper - Chopped Cheese Sandwiches | Cook's Country

Adjust oven rack to middle position and heat oven to 400 degrees. Combine beef, onion, all-purpose seasoning, and seasoned salt in 12-inch nonstick skillet. Cook over medium-high heat, constantly breaking up meat into small pieces with wooden spoon, until cooked through and excess moisture is driven off, about 8 minutes. 2 Arrange sub rolls on baking sheet and spread mayonnaise and ketchup evenly on cut sides of rolls. Divide beef mixture evenly among rolls. Layer 2 slices American cheese over beef on each roll. Bake until bread is warmed through and cheese is melted, about 5 minutes. 3 Layer tomatoes and lettuce over cheese. Close 1 sandwich, using spatula as needed to keep ingredients contained within roll (sandwich will be very full). Starting from corner of 16 by 12-inch sheet of parchment paper, immediately wrap sandwich tightly. Repeat closing and wrapping with remaining 3 sandwiches. To serve, cut sandwiches in half through parchment paper and unwrap as you eat.