Use a food processor to make pesto by, adding basil, garlic, parmesan, and pine nuts, until finely chopped, then slowly start pouring in the oil whilst the processor is turned on. Mix well then set aside.

In a large bowl, mix together the mince, onion, egg, breadcrumbs, salt and pepper, combine. If the mixture is too wet, add a little more breadcrumbs.

Take some mince and flatten it in your hand, making a small well shape in the middle. Fill with feta and sun-dried tomatoes, then pull up the sides of the mince to make some walls to protect the middle, enclose with a thin layer of mince over the top.

Heat oil in a fry-pan, carefully place the hamburger in and cook for 3 minutes, then flip. Put a lid on the frypan and let it cook for 2 minutes. Remove from pan and serve with pesto.