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 through a colander.
02 - While the pasta cooks, combine the wild garlic leaves, pine nuts, Parmesan, olive oil, garlic clove (if using), lemon juice, a pinch of salt, and a few grinds of black pepper in a food processor or blender. 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. Add the wild garlic pesto and toss vigorously, adding small splashes of the reserved pasta water to build a silky, emulsified sauce that coats every strand evenly.
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. Serve without delay.