In a blender, add the grapefruit juice, tequila blanco, lime juice, honey simple syrup, Campari, and 2 cups of ice. Blend for 30 seconds. Check the consistency and add more ice if you desire an icier Italian Paloma. Rim the cocktail glasses with salt. Pour the blended mixture into the glasses and garnish with a fresh sprig of mint. Top with sparkling water if desired.
