Preheat oven to 325 degrees F (165 degrees C). Lightly grease a medium baking dish.
In large bowl, mix the eggs, milk, croutons, cheese, onion, Old Bay and parsley. Stir in the crabmeat. Season with salt and pepper. Spoon into the prepared baking dish, and sprinkle with Parmesan cheese.
Bake 1 hour in the preheated oven, or until a knife inserted into center of the casserole comes out clean. Serve immediately.