# What you'll need:
→ Meats
01 - 1 lb beef sirloin or tenderloin, cut into thin strips
→ Vegetables
02 - 2 tbsp unsalted butter
03 - 1 tbsp olive oil
04 - 1 medium onion, finely chopped
05 - 3 cloves garlic, minced
06 - 10 oz cremini or white mushrooms, sliced
→ Sauces & Dairy
07 - 1 cup beef broth
08 - 1 tbsp Worcestershire sauce
09 - 1 cup sour cream, at room temperature
10 - 2 tsp Dijon mustard
→ Seasonings
11 - 1/2 tsp salt, or to taste
12 - 1/2 tsp black pepper, or to taste
13 - 2 tbsp chopped fresh parsley, for garnish
→ Pasta
14 - 12 oz egg noodles, cooked according to package instructions
# Method:
01 - Heat 1 tablespoon butter and olive oil in a large skillet over medium-high heat. Add beef strips in batches, searing until browned on all sides, about 2 to 3 minutes. Remove beef and set aside.
02 - In the same skillet, add remaining butter. Sauté onion until translucent, approximately 3 minutes. Add garlic and cook for 1 minute. Stir in mushrooms, cooking until golden and liquid evaporates, about 5 minutes.
03 - Deglaze pan with beef broth, scraping up browned bits. Stir in Worcestershire sauce and bring to a simmer.
04 - Reduce heat to low. Return beef and its juices to skillet. Stir in Dijon mustard and sour cream until fully combined and sauce is creamy. Avoid boiling.
05 - Simmer gently for 2 to 3 minutes to heat through. Season with salt and black pepper to taste.
06 - Serve the beef mixture over hot cooked egg noodles. Garnish with chopped fresh parsley.
