While the potatoes cook, prepare the frozen popcorn chicken. Spread the popcorn chicken evenly on the prepared baking sheet. Let them bake as per the directions on the package.
Mash the potatoes using a potato masher or fork, and give everything a good mix until it's uniformly combined. If necessary, taste and make any adjustments to the seasoning.
Heat up the gravy by pouring it into a microwave-safe bowl. Warm it in the microwave in 30-second intervals, giving it a good stir each time, until it's thoroughly heated.