Bring a large pot of salted water to a boil over high heat. Add gnocchi and cook for 1-2 minutes. Drain and set aside.

Meanwhile, melt 2 tablespoons of butter in a large skillet. Add gnocchi to the skillet in batches and saute for 2-3 minutes or until lightly browned. Transfer gnocchi to a plate and keep warm as you work.

In the same skillet, add the 6 tablespoons butter over medium-high heat. When the butter has melted, stir in the thyme. Cook, stirring occasionally, until the butter is a light golden brown.

Remove from heat and stir in the gnocchi and lemon zest. Season with salt and pepper, to taste. Garnish with grated Parmesan, if desired. Serve immediately.