In large bowl combine ½ cup Parmesan cheese, ½ cup heavy whipping cream, 8 ounces cream cheese, ½ teaspoon basil, ½ teaspoon salt, ½ cup yellow onion, 16 ounces cauliflower florets, 1 cup spinach, 2 tablespoons garlic, and 2½ cups chickenReserve half of 1½ cups mozzarella cheese to top casserole.
½ cup Parmesan cheese, ½ cup heavy whipping cream, 8 ounces cream cheese, ½ teaspoon basil, ½ teaspoon salt, ½ cup yellow onion, 16 ounces cauliflower florets, 1 cup spinach, 2 tablespoons garlic, 2½ cups chicken, 1½ cups mozzarella cheese