Preheat oven to 350 degrees. Lightly grease a small nonstick cookie sheet with sides.
In a skillet over medium heat, melt butter and saute onion and celery with salt, pepper, and poultry seasoning. Cook until onion is transparent but not browned. In a bowl, place bread cubes. Stir in cooked onion-celery mixture and toss gently. Add egg and stir to combine.
Place split fryers, breast side up on prepared cookie sheet. Divide stuffing between chicken halves and tuck under each half. Brush chicken skin with melted butter and sprinkle with salt, pepper, and generously with Mrs. Dash seasoning. Place into oven and bake uncovered for 45 minutes to 1 hour, or until juices run clear when pierced in thigh with a fork. Makes 2 generous servings. Enjoy!