"Roasted rhubarb" refers to the process of baking or cooking rhubarb in an oven or on a stovetop, usually with added sugar or flavors. This technique brings out the natural flavors of rhubarb and enhances its taste. Full definition
Fill biscuits with roasted rhubarb and serve with whipped cream. (bonappetit.com)
Fill your jars (or individual glasses) with 2 - 3 tablespoons granola, 3 - 4 tablespoons of cheesecake filling and top it all with roasted rhubarb. (happykitchen.rocks)
I made this dairy - free roasted rhubarb sherbet that I also flavored with poppy flower sugar and vanilla bean. (cannellevanille.com)