Put the mincer fully assembled (but not connected to the mixer) in the freezer a couple of hours beforehand
Light the BBQ or you can do them on a stove in a frying pan
Heat a small frying pan to medium heat, use about a table spoon of oil and sweat down the diced brown onion and 1tsp of the garlic for about 10 mins, take off the heat and drain into a bowl on paper towels and leave to cool.
Mince all the beef
Combine the minced beef and cooked onions, mix well and divide into four equal balls (around 215g each)
Work each ball of meat, wind up and and throw them onto a chopping board, finish shaping the patty into the right shape and place on a plate.
Mix the sliced red onions with two teaspoons of garlic, chilli flakes and salt and pepper in a bowl.
If you can reduce the heat on the hotplate (or cook in a seperate pan on a medium heat, turning turning every couple of minutes until they look gooey and beautiful.
Cook each patty for 2 mins on the BBQ grill or in a griddle pan, then give it a half turn, after another two minutes flip them and then two minutes later another half turn, 1 minute later place the slice of cheese on and shut the lid. One minute after that take them off the grill and leave to rest for 5 minutes
Toast the buns on both sides on the grill
Assemble as follows... the bun, butter, then a smear of mustard on each, then two slices of the cos lettuce , three slices of tomato, then the patty, topped with a good helping of the onions, ketchup and the bun top. Serve with fries and a lot of serviettes.
