Some people have problems digesting whole seeds. If you or one of your family are one of those you could mill the chia seeds up as the first step. Because its not a large quantity, the best way of doing this is to set the Speed to 10 and whilst the blades are spinning, drop the seeds through the hole in the lid.
The original recipe uses an oven temperature of 150 degrees celcius but I find I need a temperature of about 170 degrees celcius in my oven and it still takes the 60 minutes to cook. Every oven is different and you know yours best!
This makes a large loaf. Once cooled you can cut into slices and freeze (just separate the slices with some baking paper so they can be easily separated). Alternatively I find storing in the fridge makes it keep longer.
Recipe adapted to suit a Thermomix from A Gut Feeling.