Preheat the oven to 175C and line 2 baking trays.
Take the filo pastry out of the packaging. Whatever pastry you are not using (we will work 1 sheet by 1 sheet at a time), cover it with a slightly damp tea towel.
We are working in layers of three. Place one sheet of filo onto your work surface and brush lightly with butter.
Layer another sheet of filo onto the first filo and brush lightly with butter.
Add a final 3rd sheet of filo onto the previous sheet and brush lightly with butter.
Cut the pastry into 3 long strips.
Place 2 -3 tablespoons of filling mixture in 1 corner of the filo pastry strip.
Taking the bottom right or left corner of the strip fold this down diagonally so that you have created a triangle at the end of the strip.
Fold this horizontally towards the remaining pastry strip so you are sealing the filling and keeping the triangle shape.
Continue folding as per steps 8 & 9, so you are alternating between diagonal fold and horizontal fold, until the strip has been fully incorporated. Make sure you are keeping the triangle shape.
Brush the triangle with butter and place onto a lined baking tray.
Continue the steps 7 - 11 for the remaining 2 strips.
Then repeat steps 2 – 12 for the remaining filo pastry sheets until all the sheets have been utilized.
Bake for 20 to 25 minutes until golden and crisp.
Serve immediately!