Lemon Fusilli With Shrimp
Ingredients 1 pound fusilli, penne, or shell pasta 1/3 cup olive oil 3 cloves garlic, minced 1 bunch scallions, white and green parts separated, thinly sliced on the diagonal (1 cup total) 1 pound medium shrimp, peeled and deveined 10 ounces frozen peas, thawed and drained 2 teaspoons freshly grated lemon zest 1/4 teaspoon crushed red-pepper flakes 1/2 cup pasta cooking water, or white wine 3 ounces watercress sprigs, or spinach leaves (about 4 cups)...