Preheat oven at 200°C.

Chop onion and (peeled) apple into very small pieces.

Drain tins of tuna and put in a bowl with the onion and apple.

Add approximately 3 - 4 table spoons of mayonnaise. The mixture should be wet but not too much.

Add 2 tablespoons of chutney (or more if you like).

Add salt to taste and toss in the grated cheese. Mix all the ingredients together.

Lay 1 roll of puff pastry into a prepared ovenproof dish. Make sure it covers the bottom and sides of the dish.

Spoon in mixture and spread it out.

Add the top layer of puff pastry and pinch the edges together so that nothing leaks out. Brush with egg.

Put the pie in the oven for 20 to 30 minutes. The pie should be golden.

Let the pie stand once out of the oven for 20 minutes.

Serve and enjoy! This pie can be eaten as a snack or as a main meal with salad, fries or vegetables.