Grilled Portobello Mushrooms with Creamed Spinach & Roasted Asparagus Author: Bhavani Jaroff, iEat Green Ingredients ½ cup olive oil ¼ cup Balsamic Vinegar 1 Tbs Tamari 1 t. minced garlic 8-10 large Portobello Mushrooms 1 lbs spinach 1 large onion, chopped 2 Tbs olive oil 1 t. minced garlic 1 bunch asparagus ½ teaspoon salt