Heat 1 tbsp of the oil in a large saucepan, add the leek and stir. Cover and cook over a low heat for 5 minutes, stirring occasionally.
2
Meanwhile, heat 1 tbsp of the oil in a frying pan and cook half the turkey over a high heat, stirring often, until lightly brown all over. Transfer to a plate. Repeat with the remaining oil and turkey.
3
Add the turkey, stock, tomato purée and herbs to the pan and heat until simmering. Cover and simmer very gently for 25 minutes.
4
Add the carrots, cover and simmer for 5 minutes. Add the peas and beans, cover and simmer for another 5 minutes.
5
Mix the cornflour with 3 tbsp cold water. Stir into the pan and heat until slightly thickened. Serve with boiled new potatoes.