Ingredients

1/2 cup light-brown sugar

1/2 cup water

1/2 cup packed fresh mint leaves, plus sprigs for garnish

1 1/2 cups fresh orange juice

3/4 cup fresh lime juice

5 ounces light rum

1 orange, halved crosswise and thinly sliced into half-moons

1 lime, thinly sliced

6 cups ice cubes

Preparation

Bring brown sugar and water to a boil in a saucepan over medium-high heat, stirring once. Remove from heat, and add mint leaves. Let steep 10 minutes; strain, and discard leaves. Let cool. (You should have about 3/4 cup syrup.)

Stir together orange and lime juices, rum, and syrup in a pitcher. Divide orange and lime slices among glasses, and top with 3/4 cup ice. Pour rum mixture into glasses, and garnish with mint sprigs.