Heat the oven to 200 °C/180 °C fan/gas 6. Spread the tortillas with the tomato puree, leaving a 2 cm gap around the edges. Sprinkle over the oregano, then tear over the Parma ham and scatter over the sliced onion and chilli.

Cook in the oven for 10-12 mins, until crisp and golden, then slice. Spoon the Philly on in dollops – 1 for each slice, and serve with the rocket on the side.