. >> hi, i'm tavis mismiley, joine next time with singer clint holmes. that is next time.hen. >>> and by contributions to your pbs station from viewers like you. thank you. - today on america's test kitchen, julia shows how to make perfect black bean burgers, jack challenges chris to a tasting of store-bought vegetable broth, and becky prepares supergreen soup with lemon tarragon cream, right here on america's test kitchen. america's test kitchen is brought to you by dcs. dcs: manufacturers of professionally styled indoor and outdoor kitchen equipment. at dcs, our mission is design that delivers,