Step 1:In shallow dish or plastic food storage bag, combine flour, salt and pepper; mix well. Add beef; toss to coat. Remove beef from bag; place on plate. In small bowl, combine broth and remaining flour mixture from bag; blend well. Set aside.

Step 2:Spray medium nonstick skillet with nonstick cooking spray. Add oil; heat over high heat until hot. Add beef; cook and stir 2 minutes. Reduce heat to medium-high. Add onion; cook and stir 2 minutes. Add mushrooms; cook 4 minutes stirring occasionally. Stir in broth mixture; bring to a boil. Reduce heat; simmer 5 minutes to blend flavors. Remove skillet from heat; stir in sour cream.

Step 3:Serve over cooked egg noodles or rice.