Step: 1/9

Mix together the milk, curd, 4 tbsp oil and 1/2 tsp salt.

Step: 2/9

Add the flour and baking powder and mix to a smooth dough.

Step: 3/9

Peel the potatoes and grate or plane into very fine slices.

Step: 4/9

Wash the sage, shake dry and roughly chop the leaves. Peel and very thinly slice the onion.

Step: 5/9

Mix the potatoes, onions and sage with the remaining oil and season with salt and pepper.

Step: 6/9

Divide the dough into 4 portions and roll out each one to a 23cm round.

Step: 7/9

Place 2 pizzas on each baking tray lined with baking paper.

Step: 8/9

Cover 2 pizzas with half the potato-onion mixture and bake in the preheated oven for 15-20 minutes at 220°C (200°C fan, gas 7).

Step: 9/9

Repeat with the remaining two pizzas.