Watermelon-Rhubarb Margaritas are a refreshing and delicious cocktail that is perfect for summer parties, BBQs, or any occasion where you want to enjoy a cool and fruity drink. This recipe yields a sweet and tangy margarita infused with fresh watermelon and rhubarb, tequila, Triple Sec, lime juice, and a touch of simple syrup. The resulting cocktail is a sweet and tangy treat that is perfect for sipping on a hot summer day. The combination of fresh watermelon and tangy rhubarb, along with the warmth of tequila and Triple Sec and the tartness of lime juice, creates a perfect balance of flavors that is sure to impress your taste buds. It is easy to make and can be customized to your liking, making it a great drink to serve at any gathering.