For the stew; heat oil in a pan/pot. Slice in some onion, add your ginger and garlic paste. Stir fry till fragnant. Add your crushed pepper and onion mixture and stir fry. Add in your tomato paste and fry very well. Sprinkle curry powder and mixed spice pwdr. Mix in and add your stock or water. Finally, add your seasonings and salt to taste. Cover and let simmer for some minute. Serve with fried sweet potatoes