Cooking : Buttermilk Noodle Bake

Ingredients
1 1/2 pounds ground beef
1 large onion, finely chopped
1/4 cup butter or margarine
1/4 cup all-purpose flour
2 1/2 teaspoons salt
Dash pepper
2 cups buttermilk
1 (4 ounce) can mushroom stems and pieces, undrained
1/3 cup ketchup
1 tablespoon Worcestershire sauce
8 ounces egg noodles, cooked and drained

Directions
In a skillet, cook beef and onion over medium heat until meat is no longer pink; drain. In a large saucepan, melt butter. Stir in flour, salt and pepper until smooth. Gradually add buttermilk. Stir in mushrooms, ketchup and Worcestershire sauce. Bring to a boil; cook and stir for 2 minutes or until thickened. Add noodles and beef mixture; mix well. Transfer to a greased 2-1/2-qt. baking dish. Bake, uncovered, at 350 degrees F for 45 minutes or until heated through.