Preheat oven to 400°F.
Spray a 3 qt. casserole dish or 9×13 in. glass baking dish (or even disposable aluminum pan) with cooking spray or oil.
In a large bowl, lightly beat the eggs. Add in the sugar, cornstarch, seasoned salt, dry mustard, and dried minced onion. Mix well.
Stir in the corn, milk, and melted butter.
Pour the mixture into the prepared dish.
Bake for 1 hour, stirring once, or until set and lightly browned, but still soft.