Potato and pea samosas recipe

Name: Potato and pea samosas recipe
Ingredients: 500g potatoes; 120ml vegetable oil, plus extra, for deep-frying; 1 onion, finely chopped; 110g (¾ cup) frozen peas, thawed and drained well; 2 tsp finely grated ginger; 2 garlic cloves, finely chopped; 1 small green chilli, finely chopped; 4 tbsp finely chopped coriander; 1 tsp salt; 1 tsp ground cumin; ¾ tsp ground coriander; ¾ tsp garam masala; 1½ tbsp lemon juice; 260g (1 cup) plain yoghurt; 2 tbsp finely chopped mint; 225g-260g (1½-1¾ cups) plain flour; 60ml (¼ cup) chilled water