Asparagus Crab Au Gratin recipe.

Ingredients
1 (10 ounce) package frozen asparagus cuts, thawed and drained
1 (6 ounce) can crabmeat - drained, flaked and cartilage removed
1/2 cup shredded Cheddar cheese
4 tablespoons butter or margarine, divided
2 tablespoons all-purpose flour
1/2 teaspoon ground mustard
1/2 teaspoon salt
1/8 teaspoon pepper
2 teaspoons lemon juice
1 cup soft bread crumbs

Directions
Place asparagus in a greased 1-qt. baking dish. Top with crab and sprinkle with cheese; set aside. In a saucepan, melt 2 tablespoons butter. Stir in flour until smooth. Whisk in milk, mustard, salt and pepper. Bring to a boil over medium heat; cook and stir for 2 minutes or until thickened.
Remove from the heat; stir in lemon juice. Pour over asparagus. Melt remaining butter; toss with bread crumbs. Sprinkle over top. Bake, uncovered, at 350 degrees F for 30 minutes or until heated through.