- 1 lb sugar snap peas, trimmed and strings discarded
- 1 lb penne
- 1 medium garlic clove, minced and mashed to a paste with 1/2 teaspoon salt
- 1/4 cup extra-virgin olive oil
- 1 oz finely grated Parmigiano-Reggiano (1/2 cup) plus additional for serving
- Cook sugar snaps in an 8-quart pot of boiling salted water 2 minutes, then transfer 1 cup sugar snaps to a colander and rinse under cold water to stop cooking. Transfer cooled sugar snaps to a cutting board. Cook sugar snaps remaining in pot until tender, about 2 1/2 minutes more, then transfer with a slotted spoon to a bowl. Measure out and save 1 cup cooking water, reserving remaining water in pot.
- Return cooking water in pot to a boil and cook pasta until al dente, then drain in colander. While pasta is cooking, cut 1 cup sugar snaps (on cutting board) crosswise into 1/2-inch pieces. Purée half of sugar snaps from bowl, half of garlic paste, 2 tablespoons oil, 1/4 cup cheese, and 1/4 cup saved cooking water in a blender (use caution when blending hot liquids), then force purée with a rubber spatula through a medium-mesh sieve into a large bowl. Purée another batch in same manner, forcing through sieve into bowl, and add cut sugar snaps.
- Toss hot pasta with sugar snap sauce and, if necessary, enough of remaining 1/2 cup saved cooking water to thin sauce to desired consistency, then season pasta with salt and pepper.