Fay's Biftekia gemista me tiri (Burgers stuffed with Cheese)

200g. kefalograviera Greek cheese cut into sticks 

1 pound ground beef and pork mixed 

2 onions, chopped 

2Tbls of Mustard

2tbls apple cider vinegar 

Dried Oregano

1 grated fresh large tomato 

2 eggs 

4 slices stale bread, soaked in water and wrung well 

chopped parsley 

1/2 cup of olive oil 

salt and pepper 

5 large potatoes cut in 1/4

Olive oil

 Juice of 1Lemon

Method

In a bowl Mix the minced meat with bread, two thirds of the oil and onions until combine. Add the eggs, parsley, salt and pepper oregano Leave the mixture in the refrigerator 1-2 hours. Shape into patties and fill them with sticks of kefalograviera or reggato. 

In a baking tray put potatoes salt pepper oregano oil and lemon juice mix all Ingredients are combined! Bake in oven at least 45min until potatoes are nearly done. 

Brush with the remaining oil a grilling tray and place over dish with partly cooked potatoes place the burgers on top and bake at 200 ° C for 35 ' or  Place the burgers on the potato slices and cheese, butter, salt and pepper and bake at 200 ° C for about 5 minutes, until the cheese melts. Serve immediately.