01 -
1 cup freshly squeezed grapefruit juice or high-quality store-bought grapefruit juice
02 -
1/2 cup sparkling water or club soda
03 -
1/2 cup prosecco or white wine (optional)
04 -
1–2 teaspoons honey or simple syrup (adjust based on sweetness preference)
05 -
Ice cubes
06 -
2 sprigs fresh rosemary
07 -
4 thin slices fresh grapefruit (for garnish)