Steve the Bartender's Cynar Martinez (with London Dry gin)

Name: Steve the Bartender's Cynar Martinez (with London Dry gin)
Ingredients: 1 1⁄2 oz Tanqueray London Dry Gin; 1 1⁄2 oz Cynar artichoke amaro; 1⁄2 oz Luxardo Maraschino liqueur; 2 dash Angostura Aromatic Bitters