The Dirty Martini
Since there really isn't a mixer here, make sure you get a decent gin like Botanist or equivalent. You could also use vodka, but I don't know why you would want to.
2 1/2 ounces of gin
1/2 ounce dry vermouth
1/2 ounce olive brine
In a mixing glass with ice, stir the gin and olive brine. Put the dry vermouth in a chilled martini glass, swirl it around, and dump the rest of that shit out. Strain the gin and olive brine into the dry vermouth-washed martini glass. Drink with pinky out. Monocle optional.