Bring water to boil. Add beef, vinegar, salt and pepper.

Cook until beef is tender.

Shred it, store it in a box and keep in freezer.

Prepare sauce by adding mayonnaise, ketchup and mustard paste.

Add shredded beef in mAyonnaise mixture and mix well.

Spread this mixture on a long bread.

Dust crushed slims and top with olives and jalapenoes.