### Ingredients: - **4 oz** tonic water (quality matters — …

mws ·

### Ingredients:
- **4 oz** tonic water (quality matters — try Fever-Tree or Q Tonic)
- **2 oz** fresh-squeezed grapefruit juice (ruby red is best)
- **1 oz** simple syrup (or honey syrup for a richer flavor)
- **1 tbsp** fresh lime juice
- **Ice cubes**
- **Grapefruit slice & rosemary sprig** for garnish