In a medium saucepan set to medium heat, bring honey and water to a boil. Remove from heat and add arugula. Let the arugula steep for at least one hour, then strain mixture through a fine-mesh strainer.
Fill a glass with ice and add gin, arugula syrup and lime juice. Top with tonic water and garnish with a lime wheel.
Recipe by Allons-Eat! at https://www.allonseat.com/arugula-gin-and-tonic/