Instructions

1. 1

   Preheat the oven to 200°C (400°F/Gas 6). Heat the oil in a large frying pan over a low heat. Add the onion and a pinch of salt, and sweat gently for about 5 minutes until soft and translucent. Tip in the peppers, and continue cooking for a further 10 minutes until the peppers are soft. Stir through the sweetcorn and feta, and season well with black pepper.

   
   

2. 2

   Lay out the filo sheets into four piles of 3 or 4 layers about 30 × 10cm (12 × 4in), brushing each pile with a little melted butter. Divide the pepper mixture between each pile of pastry, spooning it onto the bottom right-hand corner of each one. Fold this corner so that it makes a triangle, then fold the top right-hand corner down. Repeat until you have made 5 folds in all for each one, and end up with 4 large triangles.

   
   

3. 3

   Brush the triangles all over with a little melted butter, and put them on an oiled baking tray. Bake in the oven for about 20 minutes until crisp and golden. Serve hot.