1 bag chopped iceberg lettuce (or ½ iceberg lettuce, shredded)
2 onions (1 red and 1 any colour), kept seperate and finely chopped
2 tomatoes, finely chopped
¼ tsp dried chilli flakes
400g tin red kidney beans, drained and rinsed
400g tin whole plum tomatoes
salt and freshly ground black pepper
1 tbsp ground cumin
1 tsp paprika (preferably smoked, hot if you like it really spicy)
300g/10½oz plain or Greek-style yoghurt
300g/10½oz frozen soya mince
8 soft white or wholemeal flour tortillas