Watermelon is a summer favorite in our house. Just about everyone loves biting into a juicy slice at a backyard barbecue or picnic, but getting your watermelon fix is not limited to the summer months. This sweet and tangy watermelon BBQ sauce is as tasty as it sounds, and better yet, it's extremely versatile. This fresh watermelon BBQ sauce recipe can be used as a marinade, baste, glaze, or even dipping sauce, and it's just as good over grilled chicken as it is for dipping roasted vegetables. In this recipe, the watermelon and brown sugar are the fresh and sweet flavors that perfectly balance the salty tang of balsamic vinegar, soy sauce, and dijon mustard. We've also added some red pepper flakes for a little kick, but if you like things a little spicier, go ahead and up the dose. Perhaps our favorite thing about this recipe beyond the flavors is that there is no need to prep ahead of time. Just mix all of the ingredients together and you're on your way to one tasty dinner-any time of the yearOne of our favorite ways to use this watermelon barbecue sauce is as a marinade for chicken, pork, fish or shellfish. The instructions below will give you our best practices for getting the perfect marinade.