Ingredients
Method
- Stir truffle oil into mayonnaise, chill.
- Shape beef into 4 loose patties.
- Season, sear 3 minutes without moving, flip.
- Add Gruyère in the final 2 minutes.
- Toast buttered buns.
- Build with truffle mayonnaise, patty, onions and rocket.
Notes
Add truffle oil to cold mayonnaise to preserve its aroma.
Use a good-quality truffle oil, sparingly.
Raw patties freeze well for up to 3 months.
Keep other toppings mild so the truffle shines.
