Make the apple slaw: In a bowl, mix together 1 coleslaw mix (bag), 2 apples, shredded, and 2 tablespoons lemon juice. Set aside.
Make the honey mustard: In another bowl, mix together 0.3 cups mayonnaise, 0.3 cups Dijon mustard, and 0.3 cups honey.
Preheat oven: Preheat oven to 375°F.
Prep the pan: Line a baking pan with parchment paper.
Assemble sandwiches: Open 4 sandwich buns and spread a thin layer of honey mustard inside each.
Layer the chicken: Add 1 pounds sliced roasted chicken on top of the honey mustard on each bun.
Top with cheese: Place 4 white cheddar cheese slices over the chicken on each sandwich.
Bake: Bake sandwiches until the cheese is melted and chicken is warmed through.
Add the slaw and serve: Top each sandwich with the apple slaw and enjoy!