01 - Bring a large pot of generously salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Before draining, reserve 1/2 cup of the starchy pasta water. Drain well.
02 - While the pasta cooks, combine the wild garlic leaves, pine nuts, Parmesan, olive oil, garlic clove (if using), lemon juice, salt, and pepper in a food processor. Blend until a smooth, vibrant paste forms, scraping down the sides as needed. Taste and adjust the seasoning.
03 - Return the drained pasta to the pot and immediately add the wild garlic pesto. Toss vigorously, adding splashes of the reserved pasta water until a silky, even sauce coats every strand.
04 - Divide among warm plates or bowls. Finish with extra grated Parmesan and a few wild garlic leaves or edible flowers if desired. Serve right away.