1 Medium Chilli (This can be altered depending on taste)
Pinch of Salt and Pepper to season
Separate the mince into a large bowl. Dice the chorizo into small chunks about 1cm by 1cm and add to the bowl.
Finely dice the onion, apple, garlic and chilli and add to the bowl, season to taste. (These want to be diced small enough so that you will not notice chunks of them in the finished burger.)
Add the egg to the bowl and turn all the ingredients together with your fingers making sure that all are thoroughly incorporated. Whilst doing this don't be afraid to squash the mince together breaking up the stranded shape it holds. Once you are happy with this mixture separate into 4 balls and shape into your burger. Wrap in cling film and leave in the fridge for an hour.
Pre-heat your oven to 180 place the burgers on a grill tray and cook for 25-30 min, turning halfway through. Serve on a bun with some lettuce, tomato and mayonnaise to garnish.