Flank Steak Teriyaki

• 2 chicken boullion (cubes)
• 900 gr beef flank steak
• 350 ml boiling water
• 120 ml pineapple juice from pineapple (canned)
• 120 gr long converted rice (raw grain)
• 30 ml soy sauce
• 16 ml dry sherry
• 14 gr brown sugar
• 5 ml worcestershire sauce
• 1 gr ginger (ground)