One Pan Turkey 'n' Stuffing

1 cup biscuit mix
1 1/4 cups milk
3 eggs
1 teaspoon parsley flakes
1 teaspoon dried sage leaves or 3/4 teaspoon ground sage
1/2 teaspoon salt
1/2 teaspoon poultry seasoning
1/8 teaspoon pepper
2 cups cut-up cooked turkey
1 cup chopped celery
1/2 cup finely chopped onion

Heat oven to 400 degrees F.

Saut? celery and onion in butter.

Grease a 10 x 6-inch or 11 x 7-inch baking dish.

Mix baking mix, milk, eggs, parsley, sage, thyme, salt, poultry seasoning and pepper in a dish with fork until batter is of uniform color (batter will be lumpy). Stir in remaining ingredients. Bake until golden brown and knife inserted in center comes out clean. Bake in a 10-inch dish for 35 to 40 minutes; in an 11-inch dish for 30 to 35 minutes.