In a bowl, mix together the mince, garlic, rosemary and seasoning. Heat the oil and a knob of butter in a frying pan and add the pork mixture. Cook over a high heat, while stirring, until the mince has separated and browned, about 5 minutes. Transfer to a dish and leave to cool.
Cut the chicken fillets in half lengthways. Place on a sheet of oiled greaseproof paper, leaving some space b