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 — this is key to building a silky sauce.
02 - While the pasta cooks, combine the wild garlic leaves, pine nuts, Parmesan, olive oil, garlic clove (if using), and lemon juice in a food processor or blender. Season with salt and pepper, then blend until smooth, scraping down the sides as needed. Taste and adjust the seasoning to your liking.
03 - Drain the pasta and return it immediately to the warm pot. Add the wild garlic pesto and toss vigorously, splashing in reserved pasta water a little at a time until the sauce coats every strand evenly and reaches a luxurious, silky consistency.
04 - Divide the pesto pasta among warm plates or bowls. Finish with an extra shower of grated Parmesan and a scattering of wild garlic leaves or edible flowers if desired. Serve without delay.