Dry aged rib eye with turnip thinning and sour onions

Ingredients

• Turnip thinning, about 3 small leaves pp
• Plenty of lovage leaves
• 1.5kg thick slice of beef ribeye
• Soft butter, for cooking
• Mild garlic butter
• 500ml crystal-clear whey, obtained from yoghurt or buttermilk
• 3 onions, dry and preferably never stored in a fridge, since this spoils their flavour
• 1-2 tbsp thick cream
• Birch leaf oil
• Coarse salt