2 tbsp. chopped fresh flat-leaf parsley
Cooked egg noodles or fresh egg fettuccine
5 tbsp. creme fraiche
1/2 tsp. Worcestershire sauce
1 tbsp. Dijon mustard
1 tbsp. medium onion, thinly sliced
3 tbsp. all-purpose flour
freshly ground black pepper
Kosher salt
1 pound beef tenderloin, cut into strips about 2 inches long
10 oz. cremini mushrooms, stems trimmed, caps wiped clean and thickly sliced
1/4 cup unsalted butter
3 tbsp. vegetable oil, not olive oil
1/2 oz. dried porcini mushrooms
1 1/2 cups beef broth