Mock Chopped Herring

I love a good helping of chopped herring (and when it's eaten on Kigel it's even better) but it's not always the easiest thing to get a hold of. When I tasted this and was told it was mock chopped herring I had to have the recipe. Thoroughly delicious with crackers too and very easy to make. I substituted the Matza meal with breadcrumbs.

Ingredients:

400g drained tuna
3-4 peeled green apples
1 medium onion
4 hard boiled eggs (2 go into the mixture, 2 for decoration)
1/2 - 1 cup Matza meal
1 tablespoon salt
1/4 - 1/2 cup sugar
1/2 - 3/4 cup vinegar

Method:
Grate or blend the apples, onion and eggs and mix together with the tuna
Slowly add the other ingredients
Keep tasting and add the liquids according to taste and texture