Preheat oven to 350 F and grease a 9” square baking pan.
In a large bowl, mix together the cornmeal, oats, oat flour, baking powder and salt.
Add in the melted butter, creamed corn, sour cream, maple, onions, whole corn kernels and 1 cup of the cheese. Mix until well incorporated.
Spread into the baking dish and top with the remaining cheese. Bake for about 55-60 minutes or until the cheese is melted, and the edges are golden brown. Serve warm for spoonable bread or allow to cool completely if you want to cut it into more uniform pieces. Spoon bread will still be moist and soft.