Arugula Salad with Roasted Sweet Potatoes and Mushrooms

Preheat oven to 425 degrees. On 2 large, rimmed baking sheets, toss together sweet potatoes, mushrooms, cumin, and oil; season generously with salt and pepper. Roast, rotating sheets halfway through, until vegetables are tender, browned, and dry, about 40 minutes. Reserve 4 cups sweet potatoes and mushrooms (see Cook's Note below).

In a large bowl, combine arugula with the sauteed corn and 6 cups of the roasted sweet potatoes and mushrooms; toss until arugula wilts slightly. (If you don't have leftover sauteed corn, dress the salad with a simple vinaigrette.) Serve immediately, topped with tortilla strips and crumbled goat cheese, if desired.