Bar-B-Q Hamburger

Ingredients

• 1-1/2 lbs (.7 kg). ground chuck
• 1 medium onion, diced
• 1 green pepper
• 1 cup (225 ml) ketcup
• 2 tbsp (30 ml) mustard
• 2 tbsp (30 ml) vinegar
• 3 tbsp (45 ml) sugar (more or less as you like it)
• hamburger buns