Coat the bottom of a skillet with preferred fat and cook the scallions, stirring occasionally, for 2 – 3 minutes. Add spinach and stir fry until it is not giving up water any more. Oil a roasting pan and place half the bread squares in the pan. Layer half the spinach on top, then half the cheese. Layer bread, spinach and cheese again. Top with parsley. Add a few grindings of pepper and salt, if desired, to the eggs and pour the eggs over the layers. Bake at 350 until solid, about 40 minutes. Test for doneness by inserting a knife. It if comes out clean, it’s done. You can finish it with a few minutes under the broiler if you enjoy a browned top.