Beef with stock

1 pound sirloin steak cut into thin strips 3 tablespoons flour, all-purpose divided 1/2 teaspoon salt 4 tablespoons butter or margarine 3 ounces mushrooms,[...]

5 Tbsp all-purpose flour 1/2 tsp salt Freshly ground pepper to taste 2 1/2 pounds beef stew meat (in 1 inch chunks) 2 Tbsp butter or margarine 2-3 Tbsp[...]