Tip: Marika Petraki in Mochlos solves the problem of how to cope with the bones by boiling all the small fish in a muslin bag and placing that in the colander to drain. She presses all the liquid out and then just tosses the whole thing in the garbage bin.
3 lbs small or medium sized fish (cod, snapper or rock)
3 celery stalks
1 onion, thinly sliced
Salt and freshly ground pepper
1 cup olive oil
As many slices of grouper (sfirida), as you are diners
¼ cup lemon juice
Recipe courtesy Diana Farr Louis, originally published in Feasting and Fasting in Crete by Diana Farr Louis (Kedros Publishers 2001)