*I use Maseca brand masa flour from Walmart. You can find it in the ethnic foods aisle.
I've tried oat flour in this recipe instead of oat fiber and the texture is just too gummy. I don't recommend it.
Because of the amount of masa flour, I recommend using this cornbread in a THM:E setting, but it actually doesn't contain enough carbs to be the carb source in your E meal. Paired with the beans, it's perfect, but if you don't eat the cornbread with beans, add another moderate carb source to create a true E meal. (True E meals have between 20g and 45g net carbs, and there are about 10g net carbs from the masa in this cornbread recipe.)
If you'd like to try making this a THM:FP, you could decrease the masa flour to 1 T. and add some additional oat fiber. (You may not need a full additional tablespoon since oat fiber soaks up more liquid than masa flour.)
One reader told me that she successfully replaced the Greek yogurt with no sugar added applesauce for a dairy free cornbread!