Spicy tofu fajitas

Name: Spicy tofu fajitas
Ingredients: 4 small wholemeal tortillas; 200g/7oz very firm tofu, drained; 2 tbsp cornflour or easy-cook polenta; 2 tbsp extra virgin olive oil or cold pressed rapeseed oil; 2 peppers, deseeded and thinly sliced; ½ red onion, cut into thin wedges; 1 tsp smoked paprika; ½ tsp ground cumin; ½ tsp ground coriander; 50g/1¾oz curly kale, thickly shredded and any tough stalks removed; 2 tomatoes, roughly chopped; salt and freshly ground black pepper; 4 tbsp non-dairy yoghurt; fresh coriander, finely chopped; lime wedges