Currywurst with fries

1. Peel the potatoes, cut them into sticks, soak them in cold water for 15 minutes and pat them completely dry.

2. Toss with oil and salt, spread on a lined baking tray and bake in a 220 °C oven for about 30 minutes, turning once, until crisp.

3. For the sauce, sweat the finely chopped onion in a little oil, add the tomato purée, curry powder and paprika and fry for 1 minute.

4. Add the ketchup, sugar and vinegar and simmer for 5 minutes until thick; blend smooth with a stick blender.

5. Fry the sausages in a pan until golden, then slice them diagonally.

6. Pour the hot sauce over the sausage, dust with curry powder and serve with the fries.

Tip: Soaking washes out the starch - that's what makes the fries properly crisp even in the oven.