1 hour before frying chicken, place chicken pieces in a large bowl of water and add 1 tablespoon kosher salt. Drain chicken pieces and pat dry with paper towels.
In the meantime, prepare the Mashed Potatoes. Peel and cube potatoes, cover with salted water and place on stove top to boil. Once tender, remove ¾ cup of the starchy cooking water and set aside. Keep the potatoes warm in a crockpot on low.
For The Pan Fried Chicken
Place flour on a large plate and use a whisk to stir in salt and pepper. Dredge chicken pieces in the flour coating all sides, and shaking off any excess flour. Place each piece on a clean plate. Let sit for 10 minutes to let the flour "set in".
Melt Crisco shortening in a deep sided skillet or large fry pan. When oil reaches around 375 degrees start placing the floured chicken pieces in the hot oil, skin side down. You want to oil to come about ⅓ of the way up the chicken. Cook each piece until golden brown. You don't want to over-crowd the chicken pieces. More times than not, I fry chicken in batches.
Using a meat fork, turn chicken pieces over to brown on the other side.
Use a digital read thermometer to make sure the internal temperature of the chicken has reached 165 degrees. And no pink juices are coming from the chicken.
Remove pieces to a plate lined with paper towels and tent with foil to keep warm.
For The Fried Chicken Gravy:
Drain all but ¼ cup of the oil fro the skillet. Return to medium heat and add ¼ cup flour to the pan. Please note, you can make more gravy by reserving more oil. Just remember you need a 1 - 1 ratio of oil and flour.
Cook 2 - 3 minutes or until flour is starting to turn a light golden brown. Be sure you're aggressively scraping the chicken crumb bits from the bottom of the pan.
Add milk and reserved starchy water from the potatoes. Let it bubble until thickened, at least two minutes. This is important to let the flour flavor blend with the oil. Drizzle in more milk if necessary to get a gravy consistency that's perfect for you. Remember, each time you add a little milk, let it simmer for a couple of minutes to allow the gravy to re-thicken.
Note: Once you add the liquid to the flour oil mixture to start the gravy process, you can't add more flour. It will simply clump without recovery.