Preheat the oven to 400 F(200 C).
In a large bowl mix together corn flour, all purpose flour, salt, sugar, baking soda and baking powder.
In the same bowl add corn, jalapeño pepper, cheese, cilantro and Sun-Dried tomatoes. Mix until evenly distributed.
In a separate bowl combine all wet ingredients (make sure they are all at room temperature) : buttermilk, eggs and melted butter.
Pour the wet ingredients into the dried ingredients folding them in, being careful not to overmix – there can be a few lumps.
Melt 1 tablespoon butter in a 9-inch (23cm) cast iron or oven-proof skillet.
Pour batter immediately into pan. Decorate with jalapeno slices and sun dried tomatoes if desired.
Bake for 15-20 minutes or until toothpick inserted into the center comes out clean. Serve warm.