Linguine with Collard Greens and Bacon

Name: Linguine with Collard Greens and Bacon
Ingredients: 10 bacon slices (1/2 lb), chopped; 3/4 cup pine nuts (1/4 lb); 1/4 lb shallots, finely chopped (3/4 cup); 6 garlic cloves, minced; 1 teaspoon dried hot red pepper flakes; 2 tablespoons olive oil; 3 lb collard greens, stems and center ribs discarded and leaves chopped; 1/4 teaspoon salt; 2 cups water; 1 lb dried linguine; 1 lb grape or cherry tomatoes, quartered; 1 cup Parmigiano-Reggiano shavings, made with a vegetable peeler from a 6-to 8-oz wedge