Method

Place beef in a large heavy-based saucepan with a lid. Add onion, bay leaves, peppercorns, vinegar and sugar. Cover with water. Bring to the boil. Reduce heat to low. Cover and cook for 2 hours or until beef is cooked through. Set aside in the cooking liquid to cool. Transfer to a plate and thinly slice.

Combine mayonnaise and sour cream in a bowl. Season. Place coleslaw and gherkin in a bowl. Add half the mayonnaise mixture and toss to coat.

Preheat grill on medium. Toast bread on both sides until light golden. Spread half the bread with mustard. Top with beef, coleslaw and cheese. Cook under grill for 1 min or until cheese melts. Spread remaining bread with remaining mayonnaise mixture. Place on top. Serve with fries.