With these microwaveable bags, is the water mixed directly with the veg? Isn't that boiling rather than steaming?
I use this 3 part plastic microwave steaming tub. You put water into the bottom part, veg into the perforated middle part which is not in direct contact with the water and a lid to keep the steam locked in.
The ones I get from sainsburys are just cut up veg in a bag, which you make a few holes in and them microwave for 2.5 minutes. No water other than that naturally in the veg.