How to Make It
Bring a large pot of generously salted water to a boil. Cook pasta according to package directions, adding broccoli rabe during the last 2 minutes. Drain; reserve 1 cup pasta water.
Melt butter in a large skillet over medium. Cook, stirring often, until foam subsides and butter turns golden brown, 4 to 6 minutes. Add raisins, vinegar, capers, salt, black pepper, and crushed red pepper. Cook, stirring, until raisins plump, 1 to 2 minutes.
Add pasta, broccoli rabe, and reserved pasta water to skillet. Simmer, stirring, until liquid reduces and coats pasta, about 2 minutes. Top with cheese and lemon zest.