Actress Kim Raver ("Grey's Anatomy"); actress Maggie Grace ("Love, Weddings, and Other Disasters"); sportscaster/author Roy Firestone (children's book, "Kobe and a Boy Named Roy"); chef Curtis Stone prepares a slow roasted prime rib; Orly Shani makes embellished cardigans; co-host Cameron Mathison and his daughter, Leila Mathison, bake his mother's sugar cookies; co-hostess Debbie Matenopoulos makes a green bean casserole; Shirley Bovshow has a gift guide for garden lovers; "Country Living" editor-in-chief Rachel Hardage Barrett creates a holiday table setting; the family discuss lessons learned in 2020;