Add about a tablespoon of olive oil in a cast iron skillet over medium heat.
Add chorizo and brown, 5 minutes, crumbling it into small pieces as it cooks. Remove from skillet and set aside.
Wipe out the skillet and add a little more olive oil.
Add potatoes, onion, and garlic. Cook for 15 minutes, stirring occasionally, or until potatoes have softened. If potatoes brown too fast, lower the heat.
Add the chorizo back into the pan and stir, just until warm.
Add a splash of Tabasco and season with salt and pepper.
Serve in warm, or charred, corn tortillas and top with your favorite taco toppings.