A couple of decades ago, my brother told me about steaming veggies by putting them in/on a microwave safe dish (plate, bowl, etc.) and placing a wet paper towel on top. Depending on the amount of veggies, more water may need to be added to the towel. For large amounts in a bowl, like green beans or cabbage, I also have a small amount of water in the bottom of the bowl. Stir as needed. Experiment with how much time needed, but don’t overcook. I usually prepare a lot at one time and undercook so when heated up they’ll be just right. Easy, fast, no special equipment, easy clean-up.