Beef with Bone Marrow Recipe - Great British Chefs

Ingredients

• 4 centre-cut beef marrow bones
• 4 fillet steaks, each weighing 150g
• 2 sprigs of fresh tarragon
• 1 tbsp of olive oil
• sea salt
• pepper
• 1 white onion
• 30ml of balsamic vinegar
• 30ml of olive oil
• 2 tbsp of water
• salt
• 500g of girolles, cleaned
• 2 tbsp of olive oil
• 5 oysters
• 100g of unsalted butter
• 2 egg yolks