~ First you beat the egg whites until they become foamy and thick.
~ In a large bowl, add all the ingredients, egg yolks, cheeses, butter, yogurt, water, flour, some pepper and salt if needed.
~ After mixing all ingredients well, add the egg whites and mix well again.
~ In the meantime we prepare the cooking dish (preferably Pyrex).
~ Butter your dish and sprinkle with bread crumbs.
~ Pour your mixture in the cooking dish, spread to go all over and sprinkle over again
with bread crumbs.
~ Preheat your oven to 200 degrees and cook until golden brown (about 45 minutes to an hour).
~ Serve hot.