Layer in:
Turkey, cut into bite size pieces
Leftover cooked veggies of choice (I used corn, green beans, & peas).
On top of veggies, place small (teaspoon-size) scoops of mashed potatoes ( or peel, cube, and cook 1 to 2 medium-sized potatoes until fork tender)
Pour about 1/2 cup of turkey gravy on top of this (eyeball it) (can use a cream soup mixed with a little milk in place of this)
Sprinkle about 2 tsp of dried thyme on top of this.
Sprinkle layer of shredded cheddar cheese on top of all of this.

Mix together:
3/4 cup flour
1-1/2 tsp baking powder
pinch of salt
pinch of pepper
about 1 cup of milk

Whisk until smooth and pour over top, making sure to gently push out to all the edges and corners.  Batter should be runny & will thicken while cooking. 

Bake at 350* for 45 to 55 minutes or until dish is hot & bubbly, & the topping is a nice golden brown.  If it browns too quickly, cover with foil.  

I served this dish to my family of 5 with some rolls and there is enough left over for another meal.   This is a great way to use up those leftovers that are your family is starting to get tired of.