Crispy Spaghetti with Zucchini and Herbs

Cook the spaghetti according to package directions. Heat 1 tablespoon oil in a medium (about 10-inch) nonstick skillet over medium heat. Add the onion, season with 1/4 teaspoon each salt and pepper, and cook, covered, stirring occasionally until tender, 6 to 8 minutes. Add the garlic and cook, stirring, for 1 minute. In a large bowl, toss the spaghetti with the onion mixture, zucchini, parsley, and Parmesan. Wipe out the skillet and heat 1 tablespoon oil over medium heat. Add the spaghetti-zucchini mixture, spreading it evenly over the bottom of the pan and cook until the bottom is golden brown and crisp, 8 to 10 minutes. Invert the whole thing onto a parchment-lined cookie sheet. Wipe out the skillet and heat the remaining tablespoon oil. Slide the spaghetti back into the skillet and cook until the underside is golden brown and crisp, 6 to 8 minutes more. Serve with a salad, if desired.