Preheat oven to 325 degrees. Drain one jar of marinade artichoke hearts into medium skillet, add chopped onion and saute for 5 minutes. Discard second jar of marinade. Chop artichoke hearts into small pieces.
In a separate bowl combine eggs, breadcrumbs,salt,pepper. Fold in cheese and parsley. Add artichokes and sauteed onions mixture, and blend well.
Pour into 9 inch greased glass baking dish. Bake 30 minutes. Allow to cool briefly before cutting into squares. (Can be served cold).