Preheat the oven to 180ºC and line a baking tray with baking parchment.
Heat a small saucepan on a moderate heat and spray with a little low calorie cooking spray. Add the garlic and tomato puree and cook for 2 minutes, stirring regularly.
Add the passata and oregano, stir and leave to simmer on a moderate heat for 10 minutes. It should reduce a little and thicken slightly.
Set the sauce aside to cool a little.
Unroll the pastry sheet and spread 2 - 3 tablespoons of the sauce over one half of the pastry (with the pastry lengthways). Top with the grated cheese and fold the other half of the pastry over.
Cut into 32 strips, twist each strip and place onto the baking tray.
Bake in the oven for 15 minutes until golden and crisp. Pop the rest of the sauce into a bowl and serve!