Turkish omelette

Beat the eggs together with the butter and salt.

Add the onion and spinach to a frying pan and cook until soft. Remove once done. In the same frying pan add the eggs without stirring, when it is slightly cooked, place the spinach on top and the cheese.

Peel the tortilla from the sides and fold it over to leave the filling in the center.

Cover and cook for a few more minutes depending on how you like the omelet.

Transfer to a plate and add the walnuts.