Beef Brisket Stroganoff

Heat 1 tablespoon butter in large skillet. Add onion; saute over medium heat until softened, 5 to 7 minutes. Add mushrooms; saute until mushrooms release their liquid, about 5 minutes.

Meanwhile, bring large pot of water to boiling. Add noodles and cook according to package directions, adding 1/2 teaspoon salt. Drain noodles in colander; return noodles to pot and toss with remaining 1 tablespoon butter.

Add brisket in gravy and carrots to onion mixture in skillet. Heat through, 7 to 10 minutes, stirring occasionally. Stir in sour cream; heat gently, without letting the mixture come to a boil. Serve the beef mixture over the buttered noodles.