Cut a slit in the side of each garlic clove. Place them in a microwavable bowl, cover with plastic wrap and microwave on high for 30 seconds. Cool until easy to handle, then slip off the papery husks. One by one, drop them into a running blender or food processor, letting each get thoroughly chopped before adding the next. Stop the machine, remove lid and add the remaining marinade ingredients along with 1/2 teaspoon salt and process until smooth.