Trim fat from steak. Cut steak into 1/2-inch cubes. In a large saucepan cook and stir steak cubes in hot oil over medium-high heat about 6 minutes or until beef is brown. Add onion; cook and stir about 3 minutes more or until tender.
Stir in the water, broth, undrained tomatoes, carrot, cocoa powder, and garlic. Bring to boiling; reduce heat. Simmer, uncovered, about 15 minutes or until beef is tender.
Stir in the cabbage, uncooked noodles, and the 2 teaspoons paprika. Simmer, uncovered, for 5 to 7 minutes more or until noodles are tender but still firm. Remove from heat. Top each serving with some of the sour cream. If desired, sprinkle with parsley and additional paprika. Makes 4 servings.