Make the perfectly pickled pearl onions to accompany this martini with this recipe: Pickled Pearl Onions. Make these up to a week ahead, and toss them in your favorite martini for a savory, salty kick. Enjoy these up to a month in the refrigerator.
Combine gin and vermouth in an ice-filled cocktail glass. Stir gently to cool. Strain into an ice-cold martini glass; garnish with Pickled Pearl Onions.