Preheat oven to 325. Grind Lasang Souchon tea in a spice mill or with a mortar and pestle. Combine ground tea with Ginger, Citrus and Pepper Rub, garlic, brown sugar and salt. Coat ribs with dry rub. Place in a baking dish in a single layer and cover with foil. Bake for 2 hours. Remove from oven and drain liquids. Coat ribs with barbecue sauce and return to oven, uncovered, for an additional 20-30 minutes. Meat should reach an internal temperature of at least 180 degrees for best flavor.