Cooking : Asparagus Mushroom Casserole

Ingredients
4 cups sliced fresh mushrooms
1 cup chopped onion
4 tablespoons butter or stick margarine, divided
2 tablespoons all-purpose flour
1 teaspoon chicken bouillon granules
1/2 teaspoon salt
1/8 teaspoon ground nutmeg
1/8 teaspoon pepper
1 cup 2% milk
1 (12 ounce) package frozen cut asparagus, thawed and drained
1/4 cup diced pimientos
1 1/2 teaspoons lemon juice
3/4 cup soft bread crumbs

Directions
In a nonstick skillet, cook mushrooms and onion in 3 tablespoons butter until tender. Remove vegetables with a slotted spoon and set aside. Stir the flour, bouillon, salt, nutmeg and pepper into drippings until smooth. Gradually add milk. Bring to a boil; cook and stir for 2 minutes or until thickened. Stir in asparagus, pimientos, lemon juice and the mushroom mixture.
Pour into a 1-1/2-qt. baking dish coated with nonstick cooking spray. Melt remaining butter; toss with bread crumbs. Sprinkle over top. Bake, uncovered, at 350 degrees F for 35-40 minutes or until heated through.