Step 1

Bring a large pot of water to boil. Cook noodles according to package directions, al dente.

Step 2

In a large nonstick skillet, heat the butter over medium-high.

Step 3

Add onion and garlic. Sauté until softened, about 3 minutes.

Step 4

Add ground beef and brown, breaking it up with a wooden spoon until no pink remains, 3-4 minutes. Drain off fat.

Step 5

Mix in the flour, salt and herbs. Stir in tomato paste, consommé, vinegar, and mushrooms.

Step 6

Turn down heat to medium and simmer, uncovered, stirring occasionally for 10 minutes or until mushrooms are tender.

Step 7

Remove from heat and store in the sour cream until combined and heated though.

Step 8

Serve sauce on top of the cooked noodles.