2 cups herbal liqueur, preferably green Chartreuse, chilled
2 cups gin, chilled
1/2 cup plus 2 tablespoons fresh lime juice, strained and chilled
Simple Syrup, chilled
1 bottle (1 liter) seltzer, chilled
Lime slices, for garnish
Stir together Chartreuse, gin, lime juice, and simple syrup in a punch bowl. Pour in seltzer just before serving. Ladle into ice-filled glasses, and garnish each with a lime slice.
Punch can be refrigerated overnight. Add seltzer just before serving.
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