Great for using up leftovers. I did this in my pressure cooker recently and it worked well, but you can use a slow cooker too. Keeps well in the fridge.
Fry 1 onion, 1 red pepper, 1 cubed carrot, diced potato and a clove of garlic.
Add 2 tsp Cajun spice, 1 tin tomatoes, 1 tin kidney beans, 1 tbsp brown sugar, salt and pepper. Add veg stock as appropriate, according to how thick you want your soup to be. Bring to the boil.
Either- simmer until veg are tender
Or- put in slow cooker on low (make sure you have enough liquid in there- you'd certainly need 500ml stock)
Or- put in pressure cooker for 10-15 mins.
Serve with bread and butter- classic!
Variation- Add green beans/broad beans. Add a tin of Heinz tomato soup to thicken and add sweet flavour.