Test the temperature of deep fat fryer oil with a small piece of bread or potato. If it crisps quickly, the oil is hot enough.
Make sure your ventilation is working properly and not blocked up, especially if you have a gas cooker.
In a skillet over medium high heat, bring broth to simmering; add chopped onions and bell peppers and garlic. Cover and steam 3 minutes. Spoon into slow cooker. Add remaining ingredients. Cook on low for 6 to 8 hours until stew thickens. Serve over baked potato, rice or pasta.