Preheat oven to 350 degrees. Slice the squash and cook in water 5 minutes with the onions; drain. While it's cooling, mix together the eggs, milk, cheese, salt, green chilies, baking powder, flour and parsley. Fold the mixture into the squash. Butter a 3-quart Pyrex dish and sprinkle it with bread crumbs. Pour in the squash. Sprinkle it with more bread crumbs and bake the casserole 30 minutes. Let it cool before serving.
Cajun Country -- New Iberia, Louisiana