Pickle relish and ketchup add a touch of sweetness to this sandwich spread that uses up leftover beef. "I often turn to this recipe after I have made a large roast," says Carolyn Zimmerman of Fairbury, Illinois.
In a food processor, combine the beef, pickle relish and onion; cover and process until coarsely chopped.
In a large bowl, combine the ketchup, mayonnaise, pickle juice, seasoned salt and pepper. Stir in the beef mixture. Cover and refrigerate for at least 1 hour. Spread on nine slices of bread; top with remaining bread.