Pre- heat oven to 375 degrees and prepare your 9x13 baking dish
In a large skillet over medium heat, melt your butter and add in your garlic, onion, celery, carrots and green pepper. Cook until onions are translucent.
Add thyme, basil, salt & pepper. Stir well, then sprinkle the flour on your veggies and cook for 1 minute.
Add in your water or broth then add your gravy, give it a stir. Cook for 3 to 5 minutes stirring occasionally until it thickens.
Add in your frozen corn, Turkey and peas, stir until combined. Then lastly, add in your stuffing and stir to combined. Let it simmer for 5 more minutes then turn the heat off.
Transfer all your mixture to your prepared baking dish, pressing evenly. Then spread your mashed Sweet Potato over the filling until smooth. (I use my piping bag to spread it evenly, just my personal preference)
OPTIONAL - top it with shredded cheese.
Transfer into your pre-heated oven and bake for 30 minutes.
Garnish with parsley and serve warm.