Slice yellow crookneck squash into rounds, brush both sides with olive oil, and grill for about 3 minutes each side. Set aside to cool
Using a vegetable peeler, thinly slice zucchini into long ribbons.
In a large bowl, toss together zucchini, squash, tomatoes, pistachio, mint leaves, and Feta crumbles.
In a small bowl, whisk together lemon juice, 2 tbsp olive oil, salt and pepper. Toss dressing with salad, serve on plats and top with additional sprinkle of Feta Crumbles.