4 packages (16 ounces each) frozen cut green beans
1/4 cup finely chopped onion
1/4 cup butter, cubed
2 tablespoons all-purpose flour
1 teaspoon salt
1 teaspoon paprika
1 teaspoon Worcestershire sauce
1/2 teaspoon ground mustard
2 cups evaporated milk
8 ounces process cheese (Velveeta), shredded
1/4 cup dry bread crumbs
2 teaspoons butter, melted
Cook green beans according to package directions. Meanwhile, in a Dutch oven, saute onion in butter until tender. Remove from the heat; whisk in the flour, salt, paprika, Worcestershire sauce and mustard until blended.
Gradually stir in milk. Bring to a boil; cook and stir for 2 minutes or until thickened and bubbly. Remove from the heat; stir in cheese.
Drain beans; gently fold into cheese sauce. Transfer to a large serving bowl. Toss bread crumbs and butter; sprinkle over beans.