Preparation Mix gin and thick cucumber slices in pitcher. Cover and chill overnight or up to 3 days. Strain gin, discarding thick cucumber slices. Pour half of gin into cocktail shaker. Add 1 tablespoon (or more) vermouth, then fill shaker with ice. Shake vigorously; strain into 3 glasses. Repeat with remaining gin and desired amount of vermouth. Garnish with thin cucumber slices and serve.
Preparation Mix gin and thick cucumber slices in pitcher. Cover and chill overnight or up to 3 days. Strain gin, discarding thick cucumber slices. Pour half of gin into cocktail shaker. Add 1 tablespoon (or more) vermouth, then fill shaker with ice. Shake vigorously; strain into 3 glasses. Repeat with remaining gin and desired amount of vermouth. Garnish with thin cucumber slices and serve.