Beef and Beer Pie

Name: Beef and Beer Pie
Prep time: 30 min
Cook time: 1 h 40 min
Total time: 1 h 40 min
Yield: 4 portions
Ingredients: 40 g olive oil; 600 g stewing steak; 1 tsp fine sea salt; 2 pinch ground black pepper; 150 g onions; 150 g leeks; 15 g cornflour; 250 g water; 330 g dark beer; 1 tsp fresh thyme leaves; 1 Tbsp Worcestershire sauce; ½ tsp meat stock paste; 150 g plain flour; 65 g unsalted butter; 1 medium egg; ½ tsp fine sea salt; 1 egg yolk