
Melt butter in a large skillet over medium high heat. Add garlic to the skillet, and cook, stirring frequently, until fragrant, about 1 minute.
Working in batches, add zucchini, thyme and lemon zest. Cook, flipping once, until golden, about 1-2 minutes on each side; season with salt and pepper, to taste.
Serve immediately, sprinkled with Parmesan and lemon juice.