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 will help bring the sauce together later.
02 - While the pasta cooks, add the wild garlic leaves, pine nuts, Parmesan, olive oil, garlic clove (if using), lemon juice, and a pinch each of salt and pepper to a food processor or blender. Blend until smooth, scraping down the sides once or twice. Taste and adjust the seasoning as needed.
03 - Drain the pasta and return it to the warm pot. Add the wild garlic pesto and toss vigorously to coat every strand. Splash in a little of the reserved pasta water at a time until the sauce reaches a silky, clinging consistency.
04 - Divide among warm bowls right away. Finish with an extra shower of grated Parmesan and a few wild garlic leaves or edible flowers if you have them.