Pappardelle with Arugula and Prosciutto

Preparation

1. Step 1

   Cook pasta in a large pot of boiling salted water, stirring occasionally, until al dente. Drain, reserving 2 cups pasta cooking liquid.

   Step 2

   Meanwhile, heat oil and butter in a large heavy pot over medium heat. Add leeks and cook, stirring often, until softened but not browned, 5-8 minutes.

   Step 3

   Add pasta, chives, 2 teaspoons lemon zest, and 3/4 cup pasta cooking liquid. Cook, tossing and adding more cooking liquid by 1/4-cupfuls as needed, until a glossy sauce forms that coats pasta, about 4 minutes.

   Step 4

   Add arugula and 1/3 cup Parmesan, season with salt and pepper, and toss to combine. Add prosciutto and toss again. Top pasta with more lemon zest and Parmesan.