I don't recall anyone posting a spoonbread recipe...but it will be pretty carby!

here's one I found...

               3 cups scaldedmilk
               1 cup white cornmeal
               2 ounces (1/2 stick) butter, cut into pieces
               1 tablespoon sugar
               2 teaspoons salt
               1/4 teaspoon freshly grated nutmeg
               1/8 teaspoon cayenne pepper
               4 large egg yolks
               2 teaspoons double-acting baking powder
               4 large egg whites at room temperature
               Pinch cream of tartar

In a heavy saucepan combine the scalded milk, cornmeal, butter, sugar, salt, nutmeg, and cayenne. Bring the liquid to a simmer over moderately low heat, and simmer the mixture, stirring vigorously, for 5 minutes. Scrape the mixture into a large bowl and let it cool for 5 minutes.

In a bowl with an electric mixer, beat the egg yolks with the baking powder until the mixture is light and lemon colored and stir the mixture into the cornmeal mixture.
In a large bowl with the electric mixer beat the egg whites          with the cream of tartar and a pinch of salt until they hold          stiff peaks, stir 1/4 of them into the cornmeal mixture, and          fold in the remaining whites gently, but thoroughly. Pour             the batter into a well-buttered 1-quart souffle dish and bake it in a preheated moderate oven (350 degrees) for 40 minutes, or until the top is golden brown. Serve immediately.

found another recipe that had the same ingredfients but the eggs were beaten directly into the (cooled) cornmeal mush.

then a lot of recipes add grated chedder