How to Make It
Preheat oven to 275°F. Line a rimmed baking sheet with parchment paper; coat parchment with cooking spray.
Whisk together honey, mustard, Worcestershire sauce, butter, thyme, vinegar, and pepper in a large bowl. Add Bugles, potato sticks, and Rice Chex; toss gently to coat. Spread mixture in an even layer in prepared baking sheet. Bake in preheated oven until mixture is tacky but not moist, 25 to 30 minutes, stirring every 10 minutes.
Transfer baking sheet to a wire rack; cool mixture completely, about 20 minutes.
Transfer mixture to a bowl. Add crumbled apple slices; toss to combine.