Cajun Pork Roast

• 1 seasoned salt
• 2,600 gr boston pork roast (boneless)
• 190 gr tomato paste
• 120 gr onion (chopped)
• 120 ml tiger sauce
• 120 ml worcestershire sauce
• 100 gr choppped garlic
• 14 gr brown sugar
• 12 ml dry mustard
• 10 ml steak sauce