Watermelon martinis are one of my favorite summertime drinks. Its just as good with or without the vodka! Watermelon Martini Ingredients 2 cups watermelon cut into cubes 1/2 in. piece of ginger, finely chopped juice of 1/2 lemon, save some slices for garnish. 2 cups ice optional (2 shots of vodka) Instructions 3.2.2124