Preheat the oven to 190ºC/375ºF/Gas 5.
Place the mince in a bowl with the onion, breadcrumbs, parsley, tomato puree and seasoning and mix well.
Using well floured hands, shape the mixture into 4 burgers.
Place on a baking sheet and drizzle over the olive oil.
Bake in the preheated oven for 25 minutes until golden and cooked through.
The burgers can also be cooked on a barbecue, Cook on a medium heat for about 20 minutes, turning once. Add some salad and rolls