Place 1/2 of cooked noodles (1 package) in bottom of greased casserole. Cover with minced roast beef. Put remaining noodles on top. Mix 1 can of chicken broth with 2 tablespoons prepared mustard and 1 tablespoon sugar. Pour over noodles and meat. Bake in 350 degree oven for 35 to 40 minutes. Optional - you may use cream of mushroom or cream of celery soup.