Recipe Notes:
For the perfect béarnaise, ensure butter is cold and cubed, and whisk constantly. If sauce splits, whisk in a teaspoon of hot water.
Air fryer alternative: Cook potatoes and onions at 200°C for 20-25 minutes, shaking halfway.
The steak's doneness can be adjusted: 2-3 minutes per side for rare, 4-5 for medium-well.
This dish contains allergens: cow's milk (feta), egg (béarnaise), allium (onion), sulphites (wine), and alcohol (wine).
The béarnaise sauce requires close attention - if it gets too hot, it will split. Keep heat gentle and whisk constantly.
All components can be eaten within 3 days when properly stored in the refrigerator.
