Dragon fish cakes

MAKES 16 INGREDIENTS

2 medium sweet potatoes 400gm hake fillet or other firm white fish 200ml milk 6 cloves 4 green cardamom pods 2 bay leaves 4 spring onions, finely chopped Thumb of fresh ginger, grated 4 garlic cloves, grated 1 tbsp lime juice ½ tsp turmeric Small handful coriander and parsley, finely chopped 2 finger green chillies, finely chopped 1 tsp mustard seeds 2 medium eggs Coarse semolina Salt to taste 1 tbsp vegetable oil, plus more to shallow fry