Method
1. Heat sunflower oil in a clean large cast iron skillet
2. Add stewing steak to the large cast iron skillet and sear until browned
3. Add onion, reduce the heat to medium and fry evenly until browned
4. Stir in plain flour to the large cast iron skillet
5. Then mix in stout and beef stock
6. Add horseradish sauce, tomato paste and season with salt and pepper
7. Add bay leaves to the large cast iron skillet
8. Heat until boiling
9. Transfer meat to the slow cooker bowl and cover
10. Cook until cooked through - 9 hr, low heat
11. Pre-heat oven - 205°C
12. Transfer content of slow cooker bowl to 4 pie dishes
13. Stir in button mushroom to the pie dishes
14. Top with puff pastry
15. Brush with egg, then trim off the excess pastry and crimp the edges
16. Mark diagonal lines on top and brush again with egg
17. Bake until light golden - 30 min, 205°C
18. Sprinkle with stilton cheese
19. Let cool slightly until melted
20. Serve