01 -
Boil the potatoes in salted water for 20 minutes. Once cooled, peel them and slice into 5mm rounds.
02 -
Cook the chorizo slices until they're crispy, then drain them on a paper towel.
03 -
Make a roux using butter and flour. Slowly add the milk, then stir in the tomatoes. Season and let it thicken.
04 -
Layer potatoes, chorizo, and béchamel sauce in a greased baking dish. Sprinkle the top with grated cheese.
05 -
Bake in a 180°C oven for 25-30 minutes until the top turns golden brown.