MIX first 5 ingredients. Remove 1-1/2 qt. (or 1/2 cup for trial recipe); refrigerate for later use. Place ribs in 6 hotel pans (or in 1 hotel pan for trial recipe); cover with remaining soy sauce mixture. Refrigerate at least 8 hours.
ADD water to pans cover with foil. Bake in 325ºF-convection oven 1-1/2 hours or until ribs are tender. Cool slightly. Transfer ribs to clean pans. Refrigerate until ready to use.
MEANWHILE, mix Dipping Sauce ingredients; refrigerate until ready to use.
FOR 2 servings: Cut 1 rib slab into individual ribs. Grill on medium-high heat 5 min., turning as needed and brushing with 1/2 cup of the reserved soy sauce mixture. Serve with 1 cup Dipping Sauce.