Turkey curry

3 tablespoons olive oil

1 large onion, finely chopped

4 garlic cloves, finely chopped

5cm piece of fresh ginger, peeled and grated

1 red chilli, deseeded and finely chopped

8 green cardamom pods, pods removed

1 teaspoon ground cumin

1 tablespoon ground turmeric

1 teaspoon garam masala

1 teaspoon ground coriander seeds

2 large potatoes, peeled and diced

1 butternut squash, peeled, deseeded and diced

600ml chicken or turkey stock

125ml yogurt

85ml double cream

1 tablespoon lemon juice

150g turkey, cooked and chopped

1 tablespoon chopped fresh coriander leaves

sea salt and freshly ground black pepper