Step 1

Mix steak and red wine together in a bowl; set aside to marinate for 15 to 30 minutes.

Step 2

Combine flour, salt, paprika, and black pepper together in a resealable plastic bag. Remove steak from marinade, reserving red wine for later use; add steak to flour mixture and shake to coat.

Step 3

Melt butter in a large skillet over medium-high heat; cook and stir steak, onion, and garlic until steak is browned and onion is softened and translucent, 10 to 15 minutes.

Step 4

Stir mushrooms, beef broth, water, reserved red wine marinade, Worcestershire sauce, red pepper flakes, and mustard into steak mixture until well mixed; bring to a boil. Reduce heat, cover skillet, and simmer until steak is very tender, about 1 hour.

Step 5

Stir cream cheese and sour cream into steak mixture; cook and stir until warmed, 2 to 3 minutes. Serve over cooked noodles.