A Corpse in the Soup by Morgan St. James and Phyllice Bradner (Silver Sisters Mystery Series, Book 1) from Books In Motion.com

When Godiva winds up in the hospital after being poisoned on a TV cooking show, her twin sister Goldie hops on an Alaska Airlines plane and rushes to her side. The sisters' zany romp through the world of celebrity TV chefs begins when Goldie's daughter Chili is hired by the star of the show. Rivalry turns to murder in the midst of the glitzy Gourmet Gladiators Tournament . The cops arrest Chili's new boss, Chef Caesar Romano, but Godiva has other plans for the handsome chef, and Goldie doesn't want her daughter to lose a chance at stardom, so the twins set out to prove that he is innocent. Their Jewish mother and grumpy uncle-former vaudeville magicians-help them stir the pot, but in the end Goldie and Godiva find themselves in some very hot water.