Combine first 9 ingredients in a food processor; process until smooth.
Combine cottage cheese mixture, cream cheese, and onion in a large bowl; gently fold in crab. Place crab mixture in an 11 x 7-inch baking dish coated with cooking spray. Bake at 375° for 30 minutes. Sprinkle with Parmesan and breadcrumbs. Bake at 375° for 15 minutes or until lightly golden.