Brown 1 pound hamburger meat in a skillet while you boil noodles in a pasta cooker. (Can substitute mashed potatoes). Drain hamburger meat. Add mushrooms, a jar of beef gravy, 1/2 cup sour cream, pepper, steakhouse seasoning, and noodles. Cook together until well mixed. If using mashed potatoes, cook mixture, minus pasta and then serve mixture on top of mashed potatoes. Mixture can also be put on bread and made into sandwiches.