One-pan coconut fish curry pie - Good Food Middle East

Ingredients

• 250g sweet potatoes , cut into cubes
• 2 tsp olive oil
• 1/4 tsp mustard seeds
• 1 tsp garlic paste
• 10 fresh or dried curry leaves
• 100g cherry tomatoes
• 150ml low-fat coconut milk
• 1/2 tsp turmeric
• Handful of coriander , chopped
• 280g haddock , cut into small chunks
• 160g frozen petit pois
• 60g filo pastry