Step 1Heat the oven to 350 degrees. Butter a 2 1/2-quart baking dish or pan.
Step 2Beat the eggs with a fork or egg beater in a large mixing bowl until well blended and all one color. Add the milk, salt, Jack cheese, cottage cheese, cream cheese pieces, butter, baking powder, cornmeal and chiles. Briskly stir until all the ingredients are well mixed.
Step 3Pour the mixture into the baking dish. Bake the casserole until a skewer or table knife inserted in the center comes out clean and the top is puffed and golden, 35 to 45 minutes.