Fry onion in 2 tbsp of oil; when turning brown add the water and tomato paste. Add spices and chicken cube. In the meantime while sauce is cooking, get the vegetables ready. First place the potatoes and cauliflower, then courgette and finally the pumpkin and green peppers in a slow cooker.
Pour over the sauce, cook slowly for about 40 min and always check the sauce that doesn't dry up.
When nearly cooked just before switching off the cooker, add the green olives - as much as you like.
This recipe was edited by Allrecipes.co.uk staff to conform to measures and ingredients that are familiar to UK and Irish cooks.