Animal Style Burger

Method

1. Cook the onions in the butter with a pinch of sugar and salt over medium heat for about 30 minutes, until deeply caramelized.
2. Whisk the mayo, ketchup, chives, Worcestershire and a pinch of salt, then fold in the pickles and caramelized onions.
3. Shape and season the patty. Sear 1–2 minutes over medium-high, spread mustard over the raw top, then flip so it sears into the meat.
4. Cook to your liking, melting the cheese on for the last minute.
5. Spread the sauce on the bottom bun, add the patty and close.