In a large pot combine 6 cups water and kosher salt.
Rinse and pat dry the chicken.
Place the chicken in the large pot and refrigerate for a minimum of 4 hours.
Rinse the chicken and pat dry it with a paper towel and let the chicken come to room temperature.
Preheat oven to 400 degrees.
In a small bowl, mix the softened unsalted butter, chopped garlic, the juice of 1 lemon, salt, and pepper.
Rub the butter mixture under the skin and outside of the chicken leaving about 2 tbsp behind for basting. Sprinkle some extra salt on the skin.
Cover the chicken breast with foil and bake for 20 minutes.
Baste the chicken with the leftover butter mixture.
Cover the breast with the foil, place the chicken back in the oven, while basting every 20 minutes.
Uncover the breast after cooking the chicken for 45 minutes.
Cook until the thickest part of the chicken reaches 165 degrees F.
Let the chicken rest for 10 minutes covered before carving.