Jemma O'Hanlon's Foodwatch - Easy corn and crab soup

Ingredients

• 1 tablespoon canola or rice bran oil
• 1 onion, finely chopped
• 1 cup button mushrooms, sliced
• 2 cups (500 mL) salt-reduced chicken stock
• 440 g can creamed corn
• 1 tablespoons cornflour
• 1 cup low-fat milk
• 170 g can crab meat
• 2 tablespoons chopped fresh parsley