For something refreshing after a rich meal, look no further than this classic combination of Campari and grapefruit.
Cooks' notes:
• Grapefruit with Campari syrup can be chilled, covered, up to 1 day.
• Stainless steel, glass, and enameled cast iron are nonreactive; avoid pure aluminum and uncoated iron, which can impart an unpleasant taste and color to recipes with acidic ingredients.