WIN A JAR!   It’s a Marinade, a Dip, a Spread, a Salad Dressing Chef Sharla Baker set out to create a sauce that could please any palette and succeeded with a concoction of garlicky goodness she named Sepo Sauce. Move over Ranch—there’s a new jar in town.   With an underlying garlic tang and a hint of grated horseradish, the sauce’s well-balanced flavor and creamy texture lends itself to endless versatility.   Sepo Sauce can be served simply as a salad dressing or a dip for crisp raw veggies and is equally delicious on toasted baguette slices and pita or tortilla chips. It’s a wonderful finishing sauce for tri-tip,…