PREHEAT oven to 400°F. Line 15x10x3/4-inch baking pan with foil; spray with cooking spray. Mix coating mix and basil in shaker bag. Add fish, one piece at a time; shake gently until evenly coated. Place in prepared pan.

BAKE 20 min. or until fish flakes easily with fork.

MEANWHILE, cook potatoes in boiling water in large saucepan 15 to 20 min. or until tender; drain. Add milk, Parmesan cheese and cream cheese product. Mash with potato masher until mixture is well blended and of desired consistency. Serve with the fish.