Hum seeker the trick is to cook them slower on a lower power setting (to steam them) - same goes for meat. That way the veggies retain they nutrient value better and the meat doesn't become tough - even meat pies and crumbed frozen fish don't turn into leather you just gotta be patient.
You have discovered my weakness...no patience, at least when it comes to food. I have a tendency to wait until I'm hungry to cook, and when I'm hungry, I find no patience. I can't remember ever using anything except the high setting. Guess I need to change that.