I've been microwaving my veggies for a couple years now. When I started SBD, I steamed them. But it took a long time for the water to heat, and then I noticed that when I poured the water off after cooking, it had usually taken on a strong hue in the same shade as the veggies. I looked into it and found that steaming leaches lots of nutrients into the water (and out of the veggies!). Here's a quick Q & A that talks about how nuking veggies might be the best way to cook them and preserve nutrients. Scroll down to the second question on the page (below the coffee question).
How do you make your veggies? Do you think it keeps more nutrients intact?