*You can chop the nuts coarsely in a mini food processor or coffee grinder. Note, I like to use the salted pistachios so I do not need to add extra salt to the dish.
Rinse and dry the portabello mushrooms, discard the stem (you will be using the caps whole).
Place 3 Tbsp of olive oil in a large non-stick pan and sauté the mushroom caps for a few minutes on each side until lightly browned but not completely cooked through .
Add (in this order) the minced garlic, vegetable broth, lemon juice & wine, and bring to a quick boil.
Reduce the heat to a simmer and add the chopped pistachio nuts and lemon zest, and spoon gently to coat the mushrooms.
Continue to simmer for an additional 4-5 minutes uncovered until the juices thicken.