1Heat oven to 350°F. Place potatoes in 3-quart saucepan; add enough water to cover. Heat to boiling; reduce heat to low. Cover and simmer 5 to 10 minutes or until tender; drain thoroughly. Place potatoes in ungreased square baking dish, 8x8x2 inches.
2Place cottage cheese, sour cream, flour, salt, garlic powder and pepper in food processor or blender. Cover and process until smooth. Add cottage cheese mixture, onion and cheese to potatoes; stir in gently.
3Mix corn flake crumbs and margarine in small bowl; sprinkle over potatoes.
4Bake uncovered 18 to 20 minutes or until thoroughly heated. Let stand 10 minutes before serving.