- 2 medium leeks (white and pale green parts only), rinsed well and finely chopped
- 2 tablespoons unsalted butter
- 1 cup low-sodium chicken broth
- 1 cup heavy cream
- 3/4 cup water
- 2 cups shelled fresh peas
- 1/2 pound snow peas, trimmed and halved lengthwise
- 1 1/2 teaspoons kosher salt
- 1/2 teaspoon black pepper
- 1 pound dried egg fettuccine nests
- 1/3 cup chopped fresh flat-leaf parsley
- 2 teaspoons finely grated fresh lemon zest
- 1/3 cup finely grated parmesan plus additional for serving
- Cook leeks in butter in a 12-inch heavy skillet over moderately low heat, stirring, until tender, about 5 minutes. Add broth, cream, and water and simmer, uncovered, about 5 minutes.
- Stir shelled peas into sauce and simmer 3 minutes. Stir in snow peas, salt, and pepper and simmer until peas are tender, about 5 minutes.
- Cook pasta in a 6- to 8-quart pot of boiling salted water. Drain pasta, then add to sauce, tossing to combine. Sprinkle parsley, zest, and parmesan on top and toss again. Season with pepper.