The true version by Kiyoshi Imai is:
Salted rim and add cherry
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1 maraschino cherry
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45 ml silver tequila
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20ml yellow chartreuse
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15 ml line cordial
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1 bar spoon slow gin
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Add tequila, chartreuse and lime cordial to shaker and once combine appropriately, strain into coupe.. slowly layer the slow gin to infuse into the drink, not as a layer. ENJOY!!!