Use either an 8x8 or 13x9 pan, depending on how much lasagna you would like to make. Obviously, you will need more of all of the ingredients if you use a 13x9 plan. Place a light layer of alfredo sauce in the bottom of the pan.
Place the no boil noodles in a layer.
Put down another layer of alfredo sauce.
Place a layer of vegetables. The lasagna will be more substantial and keep its size better if there is an actual layer of vegetables, rather than just a scattering of vegetables.
Place a layer of mozzarella cheese.
Repeat steps 2 - 5 for as many layers as you want to have, even on the top layer.
Cover lasagna with foil and bake at 350 degrees. When we baked it for an hour, the vegetables were more tender, whereas when I baked it for 45 minutes, the vegetables retained some crunch. (It was good both ways, but I preferred when the vegetables were still had a little crunch.)
After you take the lasagna out of the oven, allow it to sit (with foil removed) for 15 minutes.