For the lowest carb count, favor radishes over turnips or use a mix that leans more heavily on radishes and celery. If you prefer a slightly thicker stew without flour or starch, remove 1 cup of the cooked turnips and radishes with some broth, blend until smooth, and stir the purée back into the pot. This stew stores well in the refrigerator for up to 4 days and freezes for up to 3 months; cool completely before transferring to airtight containers and reheat gently on the stovetop, adding a splash of broth or water if it thickens. To keep the texture of the vegetables pleasant, avoid using very large chunks of turnip and do not skip the natural pressure release, which helps the beef stay tender.