How you cut the zucchini is up to you. You can slice it into rounds, cut it into half moons, or chop it into bite-size pieces.
Melt the butter in a wide skillet over medium-high heat. Add the zucchini and garlic and cook, stirring occasionally, until the zucchini is browned in places and tender, 3 to 5 minutes.
Turn off the heat, stir in the scallions and cheese (if using), and squeeze in lemon juice. Taste and season with salt and black pepper. Serve immediately.
