Mint Julep Margarita
Place the limes in a cocktail shaker. Sprinkle with the sugar and add the mint leaves. Muddle well, making sure the juice is really extracted from the limes and the sugar has dissolved. Add the bourbon, orange liqueur and a couple of ice cubes. Cover and shake well, then strain into a glass. Can be served over ice or straight. Top off with seltzer. Garnish with a lime wedge.