First, to dissolve the maple syrup, combine it with the rye and tequila, stirring at room temperature. Then combine all ingredients in a mixing glass full of ice. Stir while thinking about Laurel and Hardy. Strain into a chilled cocktail glass. Add the garnish.
“I'm always trying to come up with new variations of the Manhattan (Dale DeGroff’s Man O' War recipe changed my life), and I loves me some tequila! My Lady and I just picked up some maple syrup at the local greenmarket that day, and I wanted to use it in a cocktail, so there you have it. Cheers!” Brendan Casey.
Gaz Regan's Annual Manual for Bartenders: 2011