'Super crispy on the outside and with a soft, sweet and spicy onion filling inside, these samosas are sold in Chennai on carts both large and small, beautifully displayed as a samosa mountain decorated with fresh chillies.' - Chetna Makan, author of Chai, Chaat and Chutney 1 tablespoon sunflower oil, plus extra for deep-frying 4 onions, finely chopped 1 teaspoon salt 1/2 teaspoon chilli powder 1 small green chilli, finely chopped 12 sheets of filo pastry 1 egg, beaten extra small green chi...