Sautéed Mushrooms with Red Wine

Name: Sautéed Mushrooms with Red Wine
Ingredients: 1 pound portobello mushrooms; 6 tablespoons extra-virgin olive oil; Kosher salt; Freshly ground pepper; 2 leeks, white and light green parts only, halved and thinly sliced crosswise; 2 garlic cloves, minced; 2 pounds mixed white button and cremini mushrooms, halved; 2 thyme sprigs; 1/2 cup dry red wine; 1 1/4 cups vegetable broth; 1/2 teaspoon finely grated lemon zest; 1 tablespoon fresh lemon juice; 1 tablespoon dry Marsala; 1 tablespoon unsalted butter; 1 cup packed baby arugula