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Method Prep:15min › Cook:45min › Ready in:1hr
Pure heat oven to around 180 C / Gas 4.
Place mince, chopped onion, egg and bacon in a bowl and combine well. Make 8 balls, then flatten 4 into a burger patty (I use a potato masher to do this!).
On the flattened patties, cover with mozzarella to taste (I find one ball of mozzarella between 4 does the job). Then follow previous step with flattening patties and place on top of the other and create a burger shape sealing all edges.
Place in oven for about 45 minutes (depending on size they can take anywhere from 30-60 minutes).