An instant low carb cauliflower mac and cheese recipe that is ready in less than 5 minutes. This quick keto meal only requires 3 ingredients!. Kosher salt, as needed, plus 1/2 teaspoon. 1 large head cauliflower, cut into small florets. Vegetable oil spray. 1 cup heavy cream. 2 ounces cream cheese, cut. This baked keto cauliflower mac and cheese casserole is filled to the brim with cheesy goodness but without all the carbs.