Mid-winter brings a more monotonous selection in the produce aisle but a bounteous variety in the citrus section. While the fresh berries and melons of summer have faded into memory, the market is piled high with oranges, grapefruits, lemons and limes. Even though varieties of the fruit can be found throughout the year, some citrus is only available in the winter – blood orange, pommelos, Meyer lemons and tangerines. It’s the perfect time of year to add these bright flavors to a cocktail. This week, I’m making a Tangerine Drop Martini.