Pull off the membrane if it's not been removed. Cut each slab of the ribs into two pieces for easier handling. Rinse the ribs and drain. Coat the ribs well.
Preheat the oven to 325°F. Line a baking sheet with aluminum foil. Arrange the ribs, meat side down. Cover the baking sheet/dish tightly with aluminum foil. Bake them.
If used the mild marinade, you will have a lot of liquid in the baking sheet/dish. Pour it out into a sauce pan along with any reserved marinade, and bring the liquid to a boil and reduce by about half.
Option 1: Change the oven setting to broil (500°F) and preheat for a few minutes. Then broil the ribs until the ribs are lightly caramelized and charred, about 5 minutes on each side.
Option 2: Preheat the grill and grill the ribs over medium heat until the ribs are lightly caramelized and charred, about 5 minutes on each side. Baste the ribs with the sauce while grilling.