Steam cauliflower 8 minutes or till tender. Drain. Arrange in a shallow casserole dish coated with cooking spray. Combine sour cream and next six ingredients in a bowl. Stir well. Pour over cauliflower. Combine bread crumbs and paprika, sprinkle over cauliflower. Bake, uncovered at 375 degrees for 20 minutes or until hot and bubbly.