Preheat oven to 400°F (200°C).
Bring a large pot of lightly salted water to a boil. Add macaroni pasta and cook for 8 to 10 minutes or until al dente; drain.
In a 3 quart saucepan over medium heat, melt butter and stir in flour. Cook for about 1 minute, until smooth and bubbly; stirring occasionally. Mix in milk, cream cheese, salt, pepper, and Dijon mustard. Continue cooking until sauce is thickened. Add cooked macaroni and Cheddar cheese.
Pour into 2 quart casserole dish. In small bowl mix together bread crumbs, butter and parsley; spread over macaroni and cheese. Bake for 15 to 20 minutes or until golden brown and heated through.