Poorboy Pot Roast

• 6 onions (white peeled)
• 3 bottom round pot roast
• 1 arrowroot approximately
• 16 ml vinegar
• 16 ml marsala wine
• 16 ml soy sauce
• 5 ml sesame oil
• 3 gr coarse salt
• 1 gr lemon pepper
• 1 gr curry powder