Cut off and discard the green tops, then thinly slice the tender pale parts of:
Place in a blender or food processor along with:
Process until pureed, then transfer to a large bowl. Rinse, pat dry, and add:
Turn to coat each rib thoroughly. Cover and refrigerate for at least 8 and up to 24 hours. Preheat the oven to 325°F. Lightly brush a large broiler pan or rimmed baking sheet with vegetable oil. Arrange the ribs meaty side down on the pan and bake 45 minutes. Turn the ribs and bake until completely tender, 45 minutes to 1 hour longer. If desired, sprinkle with: