Jumbo turkey samosas

Name: Jumbo turkey samosas
Ingredients: 3 tbsp curry paste (we used korma); 2 tbsp mango chutney, plus extra to serve; 2 tbsp natural yogurt from a 150g pot (serve the remainder); 200g leftover cooked potatoes (roasted or boiled are fine), chopped into small chunks; 250g cooked turkey or chicken, chopped into small pieces; 250g frozen peas; bunch coriander, chopped, plus a few leaves picked to serve; 270g pack filo pastry (6 sheets); 4 tbsp vegetable oil; 1 egg, beaten; 1 tbsp sesame seeds