Tortellini with Mushroom Carbonara Sauce

Name: Tortellini with Mushroom Carbonara Sauce
Yield: Makes 6 main-course
Ingredients: 1 pound purchased fresh tortellini; 12 bacon slices, coarsely chopped; 1 pound crimini mushrooms, sliced; 2 cups chopped onions; 4 garlic cloves, minced; 1/2 teaspoon dried sage leaves; 4 large egg yolks; 1 cup whipping cream; 2/3 cup freshly grated Parmesan cheese