To prepare a vegetarian corn dog casserole recipe, first you need to prepare the ingredients. First, you'll need the following ingredients: 1 1/2 cups shredded cheddar cheese 2 tablespoons mayonnaise 1 cup chopped scallions 1 teaspoon kosher salt 1 tablespoon melted butter 1 pound frozen corn kernels 2 teaspoons thyme 2 tbsp. paprika Instructions: Preheat the oven to 350 degrees F (180 degrees C). Grease and flour 2 8-inch square baking pans. Add the dry ingredients to the wet ingredients and stir to combine. Pour the batter into the prepared pan and bake for 35 to 40 minutes or until the top is brown and bubbly. Let the mixture cool before removing it from the pan.