Cheats Beef Stroganoff With Creamy Polenta | Donna Hay

Ingredients

• 2 tablespoons extra virgin olive oil
• 600g scotch fillet steak, trimmed and cut into thin strips
• 300g Swiss brown mushrooms, chopped
• sea salt and cracked black pepper
• 1 tablespoon Worcestershire sauce
• 1 cup (240g) sour cream
• ¼ cup (60ml) water
• 1 litre milk
• 1 cup (170g) instant polenta
• ½ cup (140g) store-bought caramelised onion relish, to serve
• watercress sprigs, to serve