TORTILLA WITH ROCKET & PARMESAN

Steps:

• Cut the potatoes into slices, about finger thickness. Heat the oil in a non-stick frying pan, then tip in the potatoes and onion. When they start to sizzle and colour a little, pour in 225ml/8fl oz water - this will splatter so be careful. Simmer potatoes for 10 mins until tender.
• Pour off any excess liquid from the potatoes, then tip the eggs into the pan, season and stir lightly to mix. Return the pan to a medium heat and cook the tortilla until set on one side, about 5 mins. Place a plate on the top of the pan, hold it tightly and deftly turn it upside down so the tortilla comes out onto the plate. Add a bit of extra oil to the pan if it needs it, before sliding the tortilla back in to cook the reverse side - it only needs 5 mins more.
• Slide the tortilla onto a plate and cut it into 4 wedges. Top with a little pile of rocket, sprinkle over the parmesan, then drizzle with oil and serve.