Boil the Potatoes:
Place the chopped potatoes in a pot of boiling water. Add 1 teaspoon of salt and cook until the potatoes are tender.
Fry the Ham and Onion:
In a frying pan, heat some oil over medium heat. Add the chopped onion and ham. Fry until the onion is translucent and the ham is slightly browned.
Make the Sauce:
In a separate pan, melt the butter over medium heat. Add the flour and stir to form a roux.
Gradually add the milk, stirring constantly to prevent lumps. Cook until the sauce thickens.
Season the sauce with 1 teaspoon of salt, black pepper, and oregano.
Combine:
Once the potatoes are cooked, drain them and add them to the pan with the ham and onion.
Pour the sauce over the potatoes, ham, and onion. Stir gently to combine.
Serve:
Serve hot as a delicious and satisfying dinner.