Classic Beef Stroganoff

Ingredients

• kosher salt
• 1-1/2 lb. beef top round or shell steak, sliced 1/4 inch thick, slices cut crosswise into 1-inch pieces
• freshly ground black pepper
• 2 tbs. canola oil
• 3 tbs. unsalted butter
• 10 oz. white button mushrooms, cut into 1/4-inch-thick slices (4 cups)
• 1 cup finely chopped yellow onion (about half a medium onion)
• 1 tbs. all-purpose flour
• 1 cup lower-salt beef broth
• 1 cup full-fat sour cream, at room temperature
• 1 12-oz. package wide egg noodles
• 1 tbs. thinly sliced fresh chives