This refreshing cocktail is a wonderful summer drink. If you don't have a mulberry tree, look for a local pick-your-own farm that grows them. Sometimes they can can also be found in the freezer section at supermarkets.
In a heavy glass or cocktail shaker, muddle together 2 tablespoons of mulberries, lemon juice and sugar until berries are mashed fine and sugar is dissolved.
Add gin and muddle again.
In the bottom of a 12 ounce glass, place remaining mulberries and lemon slices and top with ice.
Strain mulberry-gin mixture through a fine mesh sieve and pour over ice.