We found a version of mashed potato stuffing in an old Amish cookbook and had to put our spin on it. It's total comfort food and makes a great side dish for Thanksgiving dinner.
Preheat oven to 350 degrees. Spray a 9x9 baking dish with non-stick spray.
Dice the onion and celery and mince the garlic.
Add the butter to a large skillet over medium heat and let melt. Once melted, stir in the onion and celery and cook for 5 minutes. Stir in the garlic and cook for 1 minute more.
Add the vegetables to a large mixing bowl along with the mashed potatoes.
Tear the bread into small pieces and add to the mashed potatoes.
Add the seasonings and stir well to combine. Taste and season with additional salt and pepper, as needed.
Spread mixture into the prepared pan and bake, uncovered, for 50-60 minutes. The top will be golden and slightly crisp when finished baking.
Serve hot.
Notes
Stale Bread: We use regular white sandwich bread for this recipe, but any type of bread should work fine. If your bread isn't stale, tear it into small pieces and bake for 20-30 minutes at 250 degrees to dry it out. Potatoes: If using leftover mashed potatoes, you may need less salt and pepper as they're likely already well seasoning. If you make mashed potatoes specifically for this recipe, be sure to season to taste. Store-bought refrigerated mashed potatoes work well here, too.