By cooking them first, the texture is more ideal for stir - frying with softer vegetables like mushroom, shredded cabbage, thinly sliced onions, carrots, etc.. (piarecipes.com)
If using soft vegetables like zucchini or dairy like cream, add them in the last 30 - 45 minutes. (KetoDietApp.com)
Add in softer vegetables and turn vegetables on sheet making sure they are all coated in liquid mixture. (iheartnaptime.net)