Once the brine has reached room temperature place the ham roast in a 2 gallon container and pour in the tea brine. Add enough cool water to completely cover the ham roast.
Use a dinner plate to weigh the roast down so that it stays submerged in the brine.
Cover and refrigerate the mixture for 6-24 hours.
Remove the roast from the refrigerator and rinse off the excess brine. Then pat it dry with paper towels.
Preheat your oven to 350 F ( 176 C).
Place the ham into a large roasting pan.
Score the top layer of fat with a sharp knife, making diamond patterns in the ham.
Then rub kosher salt and black pepper all over the ham and into the cuts in the fat.
Add enough cold water to the roasting pan so that it comes up to about 1 inch on the side of the roast.
Cover the roasting pan in foil. Wrap it tightly so that it seals in the steam. This will help keep the ham moist as it roasts.
Place the pan in the oven and roast the ham for about 2 hours. Or until its internal temperature reaches 160 F- 180 F. Then remove it from the oven.
Crank the oven up to 450 F