Barbecue

• 4 pork shoulder steaks
• 1 onion
• 1 green pepper thinly (sliced)
• 120 ml bottled barbeque sauce
• 60 ml dry wine (red)
• 16 ml cooking oil
• 9 gr quick cooking tapioca
• 1 gr cumin (ground)
• 2 slices tomatoes (sliced)