Place first 5 ingredients in a food processor or blender; process until smooth. Spoon into a bowl; stir in onions, basil, and jalapeño. Cover and chill.
Preheat oven to 450°.
Trim fat from pork; cut into 32 (3/4-inch) cubes. Place pork and bell pepper in a medium bowl. Drizzle with oil, and sprinkle with seasoning, tossing well to coat. Thread 1 bell pepper piece and 1 pork cube onto each of 32 (6-inch) skewers. Place kebabs on a broiler pan coated with cooking spray; bake at 450° for 10 minutes or until pork is done. Serve kebabs with mango sauce.