Ingredients

    *

      25g/1oz butter
    *

      1 tablespoon olive oil
    *

      2 large onions, finely chopped
    *

      750g / 1 ½ lb Pink Fir Apple Potatoes, peeled, cut and parboiled into 1cm / ½ in pieces
    *

      250g/8oz handful of fresh spinach, cooked and roughly chopped
    *

      10 free-range eggs, lightly beaten
    *

      Salt and freshly ground pepper

Preparation method

   1st

      In a large heavy pan, fry-based, heat the butter and oil. Cook the onions slowly glassy and soft.
   2nd

      Add the potato slices and fry for two minutes.
   3rd

      Stir in the spinach.
   4th

      Season the eggs with salt and freshly ground black pepper and pour the contents of the pan.
   5th

      Cook over a low to medium heat: It can take up to ten minutes until the egg is enough to flip the tortilla is set, and when the heat is too high, the soil burn before the middle is set.
   6th

      Once the bottom is browned nicely and the center has set, it is time to reverse it. This is done with a double flip: Put a plate (or the bottom of a tart tin) over the pan and turn it around once, so that the surface of the cooked tortilla on the bottom. Take a plate and turn it back so the surface is cooked on the top. Then put the pan back on the Pan Tortilla plate and flip one more time, so that the raw bit is now in contact with the bottom of the pan.
   7th

      Replace the pan over low heat, until the tortilla is cooked through.
   8th

      Serve hot, warm or cold, cut into slices or cubes.