5 green bananas or plantains (you can find these at shops selling Caribbean foods)

2 tablespoons mustard oil

1 large onion finely chopped

1 teaspoon turmeric

1 level teaspoon chilli powder

225ml water

225ml plain yoghurt

1 tablespoon minced ginger

1 teaspoon garam masala

2 cardamom seeds crushed

Scotch bonnet pepper to taste