Cook the veggies. Cut veggies into bite sized pieces. In a large skillet, heat oil over medium heat. Add mushrooms first, and sauce until just tender, 4-5 minutes. Add shallot and other veggies. Season with salt and pepper and stir often. Lower heat and take your time, cook about 5 minutes until al dente, or just fork tender. Give a splash of wine or water, turn heat up to medium to help cook off the wine. Taste, adjust salt, remembering the gremolata will add a lot of flavor, so keep the veggies simple. If you have very thick asparagus, or larger pieces of veggies, you could cover the pan for a few minutes to lightly steam them, being careful not to overcook or you may lose their lovely color. If using pea shoots as the garnish, make a well in the center of the pan and lightly sauté them (keeping them separate).