01 - Cook the noodles according to package directions. Drain and set aside.
02 - Heat olive oil and butter in a large skillet over medium heat. Add onions and cook 3 to 4 minutes until softened.
03 - Stir in minced garlic and cook for 1 minute until fragrant.
04 - Add sliced mushrooms and sauté for 6 to 8 minutes until they release moisture and begin to brown.
05 - Sprinkle flour over mushrooms and stir continuously for 1 to 2 minutes to coat evenly.
06 - Mix in tomato paste, paprika, and Dijon mustard until fully combined.
07 - Gradually pour in vegetable broth, stirring constantly to avoid lumps.
08 - Reduce heat to low and gently stir in sour cream, heavy cream (if using), and Worcestershire sauce. Simmer 3 to 5 minutes until sauce thickens.
09 - Adjust salt and black pepper to taste.
10 - Add cooked noodles to the skillet and toss to coat or serve sauce over noodles. Garnish with chopped parsley.