15 fresh mint leaves
1/4 cup simple syrup (see note)
1 cup fresh grapefruit juice, from about 2 Ruby Red grapefruits, plus 1/2 of one grapefruit, peel intact, cut into rough chunks
1 cup Lillet Rosé
1 bottle Cava, chilled
In the bottom of a pitcher, gently muddle together the mint leaves and simple syrup. Add grapefruit chunks, grapefruit juice, and Lillet Rosé. Refrigerate for at least 4 hours or up to overnight.
When ready to serve, add Cava to the pitcher and stir gently. Serve over ice.
Pitcher, muddler