1 medium onion, peeled and roughly diced
2 large eggs
450g skinless haddock or hake fillet, minced
450g skinless cod fillet, minced
2 tsp sea salt
1 rounded tsp erythritol or sugar
10 grinds black pepper
1 tbsp olive oil
1 tbsp ground almonds
1 tbsp ground golden flax seeds
3 tbsp porridge oats
1-2 tbsp oat bran or matzah meal, if needed
For the crunchy coating
2 heaped tbsp sesame seeds
2-3 slices brown bread or matzah meal
3 tbsp olive oil