Summer Berry Sorghum & Millet Crumble Bars

These summer berry crumble bars are a delicious treat when there is a glut of summer fruits and you are not sure what to make with them. Most fruits work well with this recipe, especially tart blackcurrants, blackberries or raspberries, which should be frozen first to stay whole, keep their shape and so be easier to use. A bag of frozen fruits of your choice from the supermarket work too. These bars have the added benefit of being completely gluten-free from the millet flakes and sorghum fl