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Heat the oven to 200C/180C fan/gas 6 and bake the potatoes for 50 mins-1 hr, or until tender.
Meanwhile, heat the oil in a non-stick frying pan and fry the pepper and garlic for a few minutes. Stir in the cumin seeds, chilli flakes and spices, then tip in the tomatoes, bouillon powder and beans. Bring to a simmer, cover and cook for 15 mins, or until reduced to a thick sauce. Stir in the chopped coriander.
Cut a cross into the tops of the baked potatoes and gently press on the sides to open them out. Spoon over the chilli, then top with the avocado and squeeze over some of the lime wedges. Scatter over some coriander leaves and serve with the remaining lime wedges.