Salmon, Mackerel and Potato Curry

I love spices, I love curry, and I love the combination of the oily fish and the potatoes,
I'm going to dedicate this recipe to a good friend of mine Anjula Devi, she's an absolute genius with spicing foods just right, when we finally get to meet, I'll cook this for her, I hope she approves!!!!
The recipe and method seem to be quite complicated, when I suppose we'd normally just throw everything in and let it do it's thing!!! ( sorry Anjula! I know there's more to it than that) but by cooking the fish and potatoes separately you don't end up with a gooey mess
This recipe will feed 4 people
SHOPPING LIST
500g of waxy potatoes ( such as Romano)
4 whole cloves
2 teaspoon of fennel seeds
2 teaspoon of cumin seeds
2 teaspoon of coriander seeds
A cinnamon stick
1 teaspoon of ground turmeric
250g of mackerel fillets (boneless)
250g of salmon fillet (boneless)
30g of plain flour that has been well seasoned with salt and pepper
A good splash of sunflower oil
2 large onions finely chopped
A 1 inch piece of ginger peeled and grated
5-6 green chilli finely chopped ( keep the seeds in! I love the heat)
200g natural Greek yogurt
400ml fish stock ( buy it! I won't tell anyone)
Good bunch of chopped fresh coriander
METHOD