Tomato-Tequila Fizz

Muddle 3/4 cup grape tomato halves, 1/4 cup loosely packed mint leaves, lime wedges, and kosher salt in a medium bowl to release flavors. Stir in tequila and light agave nectar; let stand 15 minutes. Press mixture through a fine wire-mesh strainer into a large container, using back of a spoon. Discard pulp and seeds. Cover and chill 1 to 2 hours. Fill a large pitcher with ice cubes; add 1/4 cup grape tomato halves and fresh mint sprigs. Add chilled tomato mixture and chilled club soda. Stir gently.