To make the dough, sift together all dry ingredients in a large mixing bowl. Then add the butter and mix with your hands til it becomes mealy.
In a separate bowl whisk together the water and egg, add it to the flour and knead it, folding over and over til you can form a ball. Wrap the ball in plastic wrap and refrigerate for at least an hour
Season the turkey drumsticks with salt and pepper. Heat oil in a large pot on high.
Sear the turkey drumsticks on all sides in the pot, then remove and set aside
Add onions, garlic and celery to the pot. Saute til soft, 5-8 minutes
Add the wine, chicken stock, parsley, thyme and sage. Stir to combine and bring to a boil. Reduce heat and simmer til reduced by half. 8-10 minutes.
Add the turkey drumsticks back to the broth, cover and simmer for 2 hours.
In a medium mixing bowl add together diced tomatoes, the diced half onion, cranberry sauce, cilantro. Season with salt to taste. Cover and refrigerate.
When the turkey has been simmering for about 90 minutes, chop the potatoes into 1" pieces, add to a large pot, cover with salted water and boil for 20 - 30 minutes.
Roll the dough out into a large sheet about 1/8" thick. Cut it into 7-8 equal sized pieces. Roll each piece into a ball.
Drain the potatoes then return them to their pot. Add butter, salt, pepper, garlic powder and mash roughly with a fork. The consistency should be rough.
Preheat oven to 400F
Remove the turkey drumsticks from the broth, pull them apart with 2 forks, discarding the bones and sinew. Add the turkey to the potatoes with the corn.
Strain the turkey broth into a separate bowl. Add all the solids to the turkey potato mixture. Mix the turkey and potatoes together with a fork til thoroughly combined.
In the turkey pot melt 1/2 cup butter. Slowly add in the 1/4 cup flour while stirring, once fully combined add the turkey broth. Whisk til thick. Adjust thickness with water as needed.
Roll out balls of dough into 8" circles about 1/8" thick. Place enough filling on half of the circle that it can be folded in half. Crimp the the edges with a fork.
Bake empanadas for 25 minutes at 400F. Serve with gravy and pico de gallo