Preheat your oven to 180C/356F.
Make the chilli in a large 31cm wide skillet (at least 6cm deep) as per the instructions in that recipe. Cook the chilli until it almost reaches your desired consistency, then remove from the heat and smooth down the top.
In a large mixing bowl, whisk together the polenta or cornmeal, tapioca flour, baking powder, baking soda and salt. Whisk in the freshly grated cheddar.
Add the wet ingredients (except for the jalapeños) to the dry and whisk to combine. The batter should be very fluffy and aerated, but not silty or split. If it does look that silty, dry or split, add more milk. Once the mixture is a batter like consistency, add the chopped pickled jalapenõs. Taste and adjust according to your preferences.
Carefully spread the cornbread mixture over the top of the chilli, making sure not to disturb the chilli underneath. I like to leave the edges uncovered to allow any excess liquid in the chilli to cook a bit more (if it needs to).
Place the skillet on a baking tray to catch any drips, then into the oven. Bake for 20-30 minutes or until golden brown and cooked through. Check at the 15-20 minute mark to ensure it isn't browning too much.
Serve warm or divide into servings in airtight containers. Keeps well in the fridge for a number of days and can also be frozen and defrosted.