1.5 pounds of ground beef 80/20 2 large onions sliced thin Pickles 12 slices American Cheese Brioche buns Salt Burger Sauce 1/2 cup mayo 3 tablespoons ketchup 2 tablespoons yellow mustard 1.5 tablespoons sweet relish 1.5 tablespoons hot sauce 1 teaspoon pepper 1 teaspoon kosher salt First thing, slice all of the onions using a…