In a large sauté pan add garlic and olive oil and cook about a minute over medium heat. Add zucchini, stir to coat with oil and garlic.
Add in broth and lemon zest cook for about 5 minutes, the zucchini should soften and come to a light simmer for a few minutes.
Toss in parsley, lemon juice, salt and pepper. Toss to fully distribute. Add pasta and sprinkle in parmesan (optional) evenly. Transferring to a serving dish is helpful as the sauciness tends to sink to the bottom, this way you can scrape all the yummy bits out on to the top of the pasta.
