Feel free to omit the balsamic when making the chia jam. I've tried these with and without, and both versions were tasty.
Go easy when placing the first layer of batter in the muffin cups. I ran out of batter a few times.
You can place up to a tablespoon of jam in each muffin if you like, just keep in mind that it might spooge out during baking. It'll still be delicious though.
Use sweetened or unsweetened coconut, flaked or shredded - your choice.