# What You'll Need:
→ Meats
01 - 1 lb beef sirloin or tenderloin, sliced 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 - ½ tsp salt, or to taste
12 - ½ tsp black pepper, or to taste
13 - 2 tbsp fresh parsley, chopped (for garnish)
→ Pasta
14 - 12 oz egg noodles, cooked according to package directions
# Step-by-Step Guide:
01 - Heat 1 tablespoon butter and olive oil in a large skillet over medium-high heat. Add beef strips in batches and sear until browned on all sides, about 2 to 3 minutes per batch. Remove beef from skillet and set aside.
02 - Add remaining butter to the skillet. Sauté onion until translucent, about 3 minutes. Add garlic and cook for 1 minute. Stir in mushrooms and cook until golden and their liquid has evaporated, approximately 5 minutes.
03 - Pour beef broth into the skillet, scraping the bottom to loosen browned bits. Stir in Worcestershire sauce and bring to a gentle simmer.
04 - Reduce heat to low. Return beef along with its juices to the skillet. Incorporate Dijon mustard and sour cream, stirring until sauce is creamy. Do not allow to boil.
05 - Simmer the mixture gently for 2 to 3 minutes until heated through. Season with salt and black pepper to taste.
06 - Serve the creamy beef and mushroom mixture over hot cooked egg noodles. Garnish with chopped parsley before serving.
