Rhubarb BBQ sauce is a tangy, slightly sweet condiment that combines the tartness of rhubarb with savory spices and smoky undertones. The rhubarb adds a natural zing that pairs well with grilled meats, especially pork and chicken. Use it as a marinade, glaze, or dipping sauce, or slather it on ribs, burgers, or pulled pork for a unique, mouthwatering kick.