Sauté onion in oil drained from artichokes. Beat eggs and add other ingredients, one at a time, stirring with fork after each addition. Oil 8 x 8 inch pan and bake mixture in it at 325ºF. for 30 to 40 minutes. Pour off excess oil when taken from oven. Cut into squares when cold. Reheat before serving. Bake 10 to 12 minutes at 325ºF.