Place onion, cilantro, tapioca, eggs and taco seasoning mix in food processor container fitted with steel blade; cover. Process using on/off action until finely chopped.
Add beans; cover. Process, using on/off action, until beans are finely chopped.
Place in medium bowl.
Add meat and 1/2 cup of the salsa; mix just until blended. Shape into oval loaf in shallow baking pan.
Bake 1 hour 15 minutes or until cooked through. Top with remaining 1/2 cup salsa.