Spinach & sweet potato samosas - Good Food Middle East

Ingredients

• 2 large sweet potatoes (about 500g), peeled and cut into small pieces
• 1 tbsp vegetable oil, plus extra for brushing
• 2 red onions, 1 chopped, 1 halved and finely sliced
• thumb-sized piece ginger, peeled and finely chopped
• 2 garlic cloves, crushed
• 1 fat red chilli, finely chopped (optional)
• small bunch coriander, stalks finely chopped, leaves picked
• 2 tbsp curry paste (we used balti)
• 2 tsp black onion (nigella) seeds
• 200g bag spinach (or frozen spinach)
• 270g pack filo pastry (6 sheets)
• ½ cucumber
• 150ml pot natural yogurt
• mango chutney, to serve