Cut pork steaks in half lengthwise. Trim excess fat. In a large skillet brown steaks on both sides in hot oil. Drian steaks on paper towels. In a 3.5or 4 litre electric crockpot arrange the onion, green pepper, and tomatoes. Sprinkle tapioca over vegetables. Place pork steaks atop vegetables and tapioca. In a small bowl stir together barbecue sauce, wine, and cumin. Pour over meat and vegetables in the crockpot. Cover and cook on low-heat setting for 6 to 8 hours or till meat and vegetables are tender. To serve, transfer meat and vegetables to a serving platter. Makes 4 to 6 servings.