Spinach Cannelloni With Bacon And Walnuts

Name: Spinach Cannelloni With Bacon And Walnuts
Ingredients: 2 tablespoons extra-virgin olive oil; 1 1/2 cups minced onions (2 medium); 1 teaspoon dried oregano; 1 teaspoon sugar; Kosher salt and freshly ground black pepper; 1/4 cup dry red wine; 1 cup canned tomato sauce; 1/2 cup water; 4 tablespoons unsalted butter; 1/4 cup plus 2 tablespoons all-purpose flour; 1 quart milk; 1 cup freshly grated Parmesan cheese; 3/4 teaspoon freshly grated nutmeg; Pinch of white pepper; 2 pounds fresh spinach, large stems discarded; 1/4 pound bacon, cut into 1/4-inch strips; 4 large garlic cloves, minced; 1/4 cup finely chopped walnuts; Basic Crêpes