HEAT oven to 375°F.
MIX meat, cilantro, bread crumbs, jalapeño peppers, egg and 2/3 of the garlic; shape into 20 meatballs, each about 1 inch in diameter.
PLACE on rimmed baking sheet sprayed with cooking spray.
BAKE 20 min. or until done (160ºF). Meanwhile, process mayo, chipotle pepper and remaining garlic in blender until smooth.
SERVE meatballs with sauce.