Mary Berry's Flavorful Beef Casserole (Rich and Tender) - My Home Made Recipe

Ingredients

• 2 lb (900 g) chuck steak or braising steak, cut into 3/4-inch (2 cm) cubes
• 1 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon freshly ground black pepper
• 1 tablespoon sunflower oil or neutral cooking oil
• 2 large onions, chopped
• 3 1/2 oz (100 g) button mushrooms, quartered
• 1 tablespoon Dijon mustard
• 2 teaspoons medium curry powder
• 1 tablespoon light brown sugar or muscovado sugar
• 2 tablespoons Worcestershire sauce
• 3 tablespoons (25 g) plain all-purpose flour
• 2 1/2 cups (600 ml) beef stock
• 1 lb (450 g) small carrots or Chantenay carrots, trimmed
• 2 tablespoons chopped fresh parsley, optional