Tear the broccoli into florets and put them in a pan of slightly salted water. Add the ginger and garlic cloves. Bring to the boil, then cook for about 5 minutes.
Meanwhile, mix the flour, cornflour, ginger powder, salt and paprika in a bowl, then coat the fish fillets in this mixture. Put them on a plate.
By now the broccoli should be cooked, so drain and purée them with a stick blender (including the ginger and garlic cloves). Season to taste. Add a pinch of cayenne for an extra kick.
Heat some oil in a frying pan and put the fish into the hot oil. Fry for a couple of minutes, then turn them over. Fry them again for another couple of minutes until their coat is golden. Don’t overcook the fish - but make sure the flesh is cooked through, particularly, if it’s a thick slice.
Serve the fish fillets with the broccoli purée.