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 ½ 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), and lemon juice in a food processor or blender. Season with salt and pepper. Blend until a smooth, vibrant green paste forms, scraping down the sides as needed. Taste and adjust the seasoning.
03 - Return the drained pasta to the pot. Add the wild garlic pesto and toss vigorously to coat every strand evenly. Add splashes of the reserved pasta water as needed to loosen the pesto into a silky, clinging sauce.
04 - Divide the pasta among warm serving bowls. Finish with an extra shower of grated Parmesan and a scattering of wild garlic leaves or edible flowers if desired. Serve immediately while hot.