Preparation

1. Peel and wash the potatoes.
2. In a saucepan, cook the potatoes with half a liter of water and the stock-cube.
3. Cook for about 20 minutes, until the potatoes will be soft. Drain them and smash them using a fork.
4. Grind the chicken breast with a knife or a food processor.
5. In a bowl, put the chicken, the potatoes, the chopped parsley, the grated Pecorino cheese, with the salt and pepper.  
6. Mix all the ingredients and form the hamburgers by separating the mixture and forming a slightly flatten meatball.
7. Brush the hamburgers with some extra virgin olive oil.
8. Heat a grill pan and, as soon as it is hot, place the hamburgers in the pan.
9. Cook them 4 minutes on each side. 
10. Slice the cabbage very finely and season to taste.
11. Serve the hamburgers with the cabbage.