Foryoueats: Party Pies (Aussie Mini Beef Pies)

Ingredients

• Filling:
• 3 tbsp olive oil
• 3 lb / 1.5kg chuck steak , cut into 1cm / 2/5" cubes (or other beef cut suitable for slow cooking)
• 2 onions , peeled and diced (brown, yellow or white)
• 3 garlic cloves , minced
• 2 tbsp tomato paste
• 4 cups / 1 litre / 1 quart beef stock/broth
• 1 cup red wine (anything dry and dark, not light like pinot noir)
• 2 dried bay leaves (or 3 fresh)
• 1 1/2 tsp salt , plus more to taste
• 2 tsp black pepper
• 3 tbsp cornstarch (cornflour)
• 4 tbsp water
• Pastry:
• 1 egg yolk , lightly beaten (or 1 whole egg, for a slightly less dark golden finish)
• 4 sheets frozen shortcrust pastry (25cm x 25cm / 10" x 10"), thawed
• 3 - 4 sheets frozen puff pastry (25cm x 25cm / 10" x 10"), thawed (Note 1)
• To Serve:
• Tomato Sauce / Tomato Ketchup