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 the pasta through a colander.
02 - While the pasta cooks, combine the wild garlic leaves, pine nuts, Parmesan cheese, olive oil, garlic clove (if using), lemon juice, and a generous pinch each of salt and pepper in a food processor or blender. Blend until a smooth, vibrant green paste forms, scraping down the sides as needed. Taste and adjust the seasoning to your liking.
03 - Return the drained pasta to the pot. Immediately add the wild garlic pesto and toss vigorously to coat every strand. Splash in the reserved pasta water a little at a time until the sauce reaches a silky, clinging consistency that evenly coats the pasta.
04 - Divide the pesto pasta among warm serving bowls. Finish with an extra shower of grated Parmesan and scatter a few wild garlic leaves or edible flowers over each portion if desired. Serve right away while hot.