To prepare an ore ida sweet heat corn casserole recipe, first you need to prepare the corn. First, you'll need the following ingredients: 1 pound sweet corn kernels 1 cup water 1/2 cup cornmeal 2 tablespoons cornstarch 1 teaspoon salt 1/2 teaspoon pepper 1 tablespoon butter 12 cup melted margarine 2 teaspoons kosher salt Instructions Preheat the oven to 350 degrees F. In a large skillet, heat the oil over medium-high heat. Add the chopped onion and cook until the onion is translucent, about 5 minutes. Stir in the flour, then add the milk and stir to combine. Cook the mixture, stirring constantly, until thickened and bubbly, 2 to 3 minutes, scraping up any browned bits from the bottom of the pan. Pour the hot corn mixture into the casserole dish and top with the shredded cheddar cheese. Bake for 35 to 40 minutes or until heated through. Serve with sour cream, if desired.