Overview: Test cook Bridget Lancaster shows host Christopher Kimball how to make Atlanta Brisket. Then, tasting expert Jack Bishop challenges Chris to a tasting of steak sauce. And finally, test cook Julia Collin Davison shows Chris how to make Roasted Salt-and-Vinegar Potatoes. Recipes: Atlanta Brisket, Roasted Salt-and-Vinegar Potatoes Taste Tests: Steak Sauce