Secret Sauce ¼ cup mayonnaise 2 tablespoons ketchup 1 tablespoon Dijon mustard 1 teaspoon pickle juice ¼ teaspoon paprika ¼ teaspoon garlic powder Patty Melts 2 tablespoons olive oil 2 large onions, thinly sliced 12 ounces 85/15 ground beef ½ teaspoon salt ½ teaspoon pepper 1 teaspoon Worcestershire sauce 8 slices rye bread 3 tablespoons…