Press spinach between paper towels to remove excess moisture; set spinach aside.
Position knife blade in food processor bowl. Add cottage cheese and next 5 ingredients; process until smooth. Add spinach, onion, and next 3 ingredients; process 45 seconds.
Coat an 11- x 7- x 1 1/2-inch baking dish with cooking spray. Cut phyllo sheets in half crosswise. Place 1 half-sheet of phyllo in bottom of dish (keep remaining phyllo covered). Lightly coat phyllo with cooking spray, and sprinkle with 1 teaspoon breadcrumbs. Repeat layers six times, coating each with cooking spray and sprinkling with 1 teaspoon breadcrumbs. Top with 1 half-sheet of phyllo; lightly coat with cooking spray. Spread spinach mixture over phyllo in pan. Top spinach mixture with remaining 4 phyllo half-sheets, coating each with cooking spray. Bake at 350° for 40 minutes or until golden. Serve with tomato wedges.