Beef Stroganoff

WHAT YOU'LL NEED

• 2 Tbsp. (30 mL) margarine
• 1 lb. (500 g) beef stir fry strips
• 3 cups (750 mL) sliced mushrooms
• 1 pouch Knorr® Recipe Onion Soup Mix
• 2 cups (500 mL) water
• 1 Tbsp. (15 mL) all-purpose flour
• 1/3 cup (75 mL) sour cream (less than 5% M.F.)
• 12 ounces (375 g) egg noodles, cooked and drained