Peel and grate the onion, and place it in a large bowl with the minced pork.
Peel, core and grate the apple and add it to the bowl.
Finely chop the sage leaves and strip the leaves from the thyme and add them to the mix.
Add the salt and pepper and mix to combine. This mix will be quite wet; add enough breadcrumbs to hold it all together.
When you are ready to make the burgers, heat a pan over a high heat.Now is a great time to fry off a small amount of the mix to test the seasoning. If the seasoning is right, divide into two and form into patties and set them aside to rest if you have time.
Pour the oil over the burger patties and rub it in on both sides, then place the burger in the pan and cook for 2-3 minutes on each side.
When the burgers have cooked, sear off the burger buns for 30 seconds
Add the rocket to the base of the bun, followed by the burger and then a generous topping of chutney.