Add lemon chunks and mint leaves with a little grain sugar in a glass. Muddle the lemon and the mint, but make sure you don’t muddle the lemon too hard or the drink will become too bitter. Add the lime juice. Fill the glass with crushed ice and using a stirrer spread the lemon mint and the sugar uniformly. Pour the watermelon syrup over the ice and add the vodka. Balance the flavor by adding more lime juice or sugar syrup. Serve Red Czar Vodka Cocktail chill.
Romanov Red vodka