In a small pot, add enough water to cover the potatoes. Add the salt and potatoes. Bring the water to a boil over high heat. Once it comes to a boil, lower the heat and cook until soft, about 10 minutes.
Prick the potatoes with a knife, if it goes in and out without resistance, they are ready. Remove from the pot and reserve.
In a large skillet over medium heat, add the oil and heat. Then add the onions and sauté for 3 minutes.
Add the garlic, culantro, and sweet peppers and continue sautéing for three (3) more minutes. Add the curry powder (secret ingredient), black pepper, and mix everything.
Add the tomato sauce and keep mixing everything.
Now add the shredded cod and the previously parboiled potato. Mix with the rest of the ingredients. If you see that the sauce is a bit dry, you can add a splash of water and let it cook for 5 to 10 minutes.
Once time is up, you can turn off the heat and serve. If you like, at this time, you can add a little spicy sauce and enjoy!