01 -
Roll the 80/20 beef into 1/3 pound (150g) balls. Chill them in the fridge for 30 minutes to firm them up.
02 -
Using a mandoline slicer with a protective shield, slice the onions thinly. Press out extra liquid and chill until you need them.
03 -
Fry bacon until it's crisp, then chop it into tiny pieces. Set half aside for the Baconnaise and hold onto the rest for burgers.
04 -
In a bowl, combine mayo, mustard, ketchup, half the bacon, chili flakes, a dash of apple cider vinegar, Worcestershire sauce, and the seasoning rub. Mix well and let it cool in the fridge.
05 -
Preheat the griddle to a medium-high heat. Drizzle a little avocado oil on it. Space the burger balls about 2-3 inches apart and top each with some sliced onions. Smash the meat flat with a press and sprinkle on your seasoning.
06 -
After 3-4 minutes, when the edges are crispy, spread a bit of mustard on the patties. Flip them over, add a slice of cheese, and cook for 3 more minutes until the cheese softens and covers the meat.
07 -
Warm up your buns on the griddle until they get golden. Spread Baconnaise on the base bun, stack on two cheesy patties, sprinkle leftover bacon, drizzle more sauce, and top with the lid.