The day before plan to cook your turkey, combine the the salt, brown sugar, vegetable broth, peppercorns, allspice and ginger in a large pot. Bring to a boil over medium-high heat, stirring to dissolve the solids. Boil for 1 minute and then remove from heat. Let cool completely and refrigerate until ready to use {you can do this 1-2 days in advance of when you plan to use it}.