I've just discovered Tesco's pre soaked tinned green lentils. They need lots of flaovurs adding (curry pastas etc) to them, but they are 10-15g/100g CHO. Unsoaked ones are about 70g/100g CHO.
My husband has had jet lag over the last few days so his blood sugar has been all over the place.
Lentils are a great store cupboard ingredient for emergencies!