Preheat your oven to 400°F (200°C) to ensure a perfect bake.
If using frozen chicken tenders, allow them to sit at room temperature for about 5 minutes to soften.
Optionally, slice them into smaller pieces for easier serving.
Begin by spreading the mashed potatoes evenly on the bottom of a 9 x 13 casserole dish.Pro tip: if your mashed potatoes are cold, warm them before use Sprinkle corn and freshly grated cheddar cheese over the layer of mashed potatoes, ensuring even distribution.
Carefully arrange the chicken tenders on top of the casserole, covering the potatoes, corn, and cheese.
Bake the uncovered casserole in the preheated oven for 20 minutes if using frozen chicken tenders, or 15 minutes if using homemade ones.
While the casserole bakes, prepare your brown gravy on the stovetop according to package instructions or your own recipe.
Once baked, drizzle your desired amount of warm gravy over the casserole and serve hot. Serve and enjoy!