In soups that traditionally include a consommé as the base, such as French Onion Soup, what are some ways to replace the mouthfeel of the gelatin-rich stock when converting the recipe to be vegetarian?
Background - I am quite happy with my vegetarian French Onion Soup recipe, using Vegemite to add umami, and homemade vegetable stock for a solid base, but the one aspect left somewhat unsatisfying is the "richness" or unique mouthfeel of the consommé. I know there won't be any perfect replacement, but I need some inspiration. Most discussions on gelatin substitution seem to focus on more obvious gelatin applications (jello-style desserts). I'm hoping that for soup mouthfeel there might be some other options I haven't considered.