Step 1

Cook noodles in a pot of salted water according to package directions, I like to under-cook them a bit so I can mix it with the sauce and let it finish cooking.

Step 2

Meanwhile, while the water starts to boil for the noodles, heat a large nonstick skillet over medium-high heat.

Step 3

Melt butter over medium heat and add onions to the pan. Cook 2 - 3 minutes over medium-low heat. Add flour; stir with a wooden spoon for 30 seconds.

Step 4

Gradually add broth, Worcestershire sauce, and tomato paste, stirring constantly.

Step 5

Add mushrooms, thyme, salt and pepper; stir and cook 4-5 minutes or until thickened and bubbly, stirring constantly.

Step 6

Add wine; bring to a boil, reduce heat, and simmer 4 minutes. Remove from heat; let stand 30 seconds.

Step 7

Stir in sour cream; add noodles, mix well and garnish with parsley if desired.