Crumble the chorizo and using a saucepan, fry until golden brown. Remove it to a plate and reserve.
If needed add some oil to the chorizo fat and sauté the onion until they are clear, add the peppers and stir.
Add the tomatoes and season with salt and pepper, let it cook until the tomato is soft and release juice.
Add the potatoes and the chorizo, stir carefully, let it cook for a few minutes so that the flavors are well integrated, correct the seasoning and continue cooking for a few more minutes.
Serve them with grated cheese, sour cream and corn tortillas