In large skillet, heat 3 Tbsp. butter. In medium bowl, mix 1/4 cup flour, salt and dried mustard. use mixture to dust steaks.
Fry steaks in butter to medium doneness, roughly 8 to 10 minute on each side. Remove steaks to a greased 9 x 13 inch baking dish. Add remaining 1 Tbsp. butter to skillet and saute on ins and pepper til tender. Add remaining 2 Tbsp. flour to form a paste. Add drained tomatoes, and beef broth and bring to ab oil, allow sauce to thicken.Simmer for about 10 minutes. Pour over steaks. Cover and freeze
Thaw in refrigerator or microwave. Preheat oven to 350. Cover and bake for 35 to 40 minutes. Remove cover and bake another 15 minutes.