Heat oven to 200°C, 180°C fan, Gas Mark 6 and grease a large shallow ovenproof dish. Heat the oil in a large pan, add the onion, celery and carrot and fry for 5 minutes. Stir in the garlic and chilli then fry for 5 minutes more. Add the rice and chilli powder, stir over the heat then pour in the passata with a stock cube and 200ml water. Cover the pan and cook for 8-10 minutes until the rice is tender. Stir in the beans and half the coriander and feta.
Meanwhile heat the tortillas according to the pack instructions. Once the bean mix is ready, roll up the mixture in the tortillas and arrange them in a large ovenproof dish, you can halve them if you like. Crumble over the remaining feta and bake for 30-35 minutes.
Meanwhile mix the remaining coriander with the red onion, avocado and lime. Spoon the salsa on top of the tortillas and serve with a side salad.
If you have a gas hob you can heat the tortillas over a gas flame using tongs to give them a chargrilled flavour.
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