Cook the Pasta: Fill a large pot with water and bring it to a boil. Add a generous amount of salt to the boiling water. Add the pasta and cook according to the package directions until al dente. Reserve 2-3 tablespoons of the pasta cooking water, then drain the pasta using a colander.
Prepare the Garlic Scapes: While the pasta is cooking, heat 1-2 tablespoons of vegan butter or olive oil in a large skillet over medium heat. Add the chopped garlic scapes and 1-2 teaspoons of fresh thyme leaves to the skillet. Sauté for 5-8 minutes until the garlic scapes are tender and slightly browned.
Combine Ingredients: Once the pasta is drained, add it to the skillet with the garlic scapes. Pour in the reserved pasta water to help create a sauce. Add parmesan cheese, chopped fresh parsley, and the zest and juice of 1 lemon. Stir everything together until well combined and the cheese is melted.
Season and Serve: Taste the pasta and adjust the seasoning with salt and black pepper as needed. Serve the pasta hot, garnished with additional parsley and parmesan if desired.