Pattypan Squash Stuffed With Corn

1. Cut the pattypan squash in half along the equator. Using grapefruit spoon, scoop out the seeds in the middle and discard. Scoop out the flesh to within 1/2 inch of the outside and finely dice. Lightly salt the pattypan shells, and let sit while you prepare the filling.
2. Preheat the oven to 350 degrees. Oil a baking dish or casserole large enough to accommodate the pattypan shells.
3. Heat the olive oil over medium heat in a large, heavy skillet. Add the onion. Cook, stirring often, until tender, about five minutes. Add the diced squash and cook, stirring, for four to five minutes until tender. Add the corn, and cook, stirring often, for four minutes until just tender. Remove from the heat, and stir in the Parmesan and the cilantro or parsley. Season to taste with salt and pepper.
4. Fill the pattypan shells with the corn mixture, and arrange in the baking dish. Beat together the egg and milk, season with a little salt, and carefully spoon a little over the corn mixture in each filled squash. Add a small amount of water to the dish (about 1/4 inch). Cover tightly, and place in the oven. Bake 45 to 50 minutes to an hour until the squash is tender. Remove from the heat, and transfer to a platter. Serve hot or warm, garnished with additional chopped cilantro or parsley.
Variation: Coarsely chop the corn kernels in a food processor fitted with the steel blade before cooking.