Otoño Paloma
A grapefruit slice sprinkled with ground cinnamon.
ADD tequila, lime juice, grapefruit juice, Cointreau, cinnamon simple syrup*, and 2 dashes of grapefruit bitters to a shaker filled with ice. Shake until chilled. Strain into a Rocks or Collins glass filled with ice. Top with 1-2 oz soda water. Garnish.

*Cinnamon simple syrup recipe*
Combine 1 cup granulated sugar, 1 cup filtered water, and 4 cinnamon sticks (broken into large pieces) in a saucepan. Bring to a boil over medium heat, then reduce and simmer - stirring frequently - until the sugar has dissolved. Remove from heat and let cool. Discard cinnamon sticks and strain into a jar with a lid.
[['3 cl', 'Grapefruit juice (pink)'], ['6 cl', 'Blanco tequila (100% agave)'], ['1.5 cl', 'Lime juice (freshly squeezed)'], ['1.5 cl', 'Cointreau triple sec liqueur'], ['2 dash', 'Grapefruit bitters'], ['Top up with', 'Soda (club soda) water'], ['2.25 cl', 'Cinnamon sugar syrup']]
[['3 cl', 'grapefruit juice'], ['6 cl', 'tequila'], ['1.5 cl', 'lime juice'], ['1.5 cl', 'triple sec'], ['2 dash', 'grapefruit bitters'], ['Top up with', 'soda water'], ['2.25 cl', 'cinnamon sugar syrup']]