1. In a large pitcher, add the grapefruit juice, tequila (if using), lime juice, and sage ginger syrup. Chill until ready to serve.2. When ready to serve, if desired, rim glasses in vanilla salt (recipe above), and fill with ice. Pour the beverage into prepared glasses. Top with seltzer.3. Garnish with pomegranate and sage. 4. To Make a Mocktail:omit the tequila and use 3/4 cup of additional grapefruit juice and 3/4 cup of additional seltzer.