Servings: 6 servings Cook time: 1 hour, 15 minutes Ingredients 2 tablespoons extra-virgin olive oil 1 small yellow onion, peeled, halved, and sliced into 1/4-inch-thick slices 1/2 to 1 teaspoon red pepper flakes 2 (28-ounce) cans whole tomatoes 1 1/2 cups water 1/4 cup loosely packed fresh basil leaves Kosher salt Freshly ground black pepper Crème fraîche, for garnish (optional) Directions Heat the olive oil in a large saucepan over medium heat until shimmering. …