Preheat oven to 425 degrees. Pour oil into a 10-inch cast iron pan. Heat in oven for about 8 minutes.
In a large bowl, combine cornmeal, flour, sugar, salt, baking powder, and baking soda.
In a medium bowl, whisk together buttermilk, eggs, and melted butter.
Make a well in the middle of dry ingredients and pour in wet ingredients.
Add corn, red bell pepper, and jalapeno and stir everything together just until combined.
Carefully pour into hot pan. Scatter all toppings EXCEPT feta cheese and thyme and rosemary on top. Bake for 25 minutes.
Remove from oven. Sprinkle with feta cheese and herbs and return to oven for 3-8 minutes or until firm in center.