In large saucepan, heat oil. Dust beef cubes with flour, shaking off excess. Add beef, onion and mushrooms to oil; brown 5 minutes. Add pickle, paprika, wine and broth; bring to a boil. Reduce heat; simmer 10 minutes. Add sour cream; heat through. Season with salt and pepper; serve over bed of warm wild rice. Garnish with cheese and chives.