Mix in the ground pork gently to combine. Sprinkle with salt and black pepper. Cover and refrigerate for at least 1 hour and up to 24 hours to allow the flavors to meld.
For the tortilla: Preheat the oven to 350 degrees F. Heat the oil in a large nonstick saute pan over high heat. Add the chorizo and cook until golden brown. Transfer to a paper-towel-lined plate using a slotted spoon. Remove all but 2 tablespoons of the fat from the pan..
Whisk together the eggs in a large bowl until pale and fluffy. Add the cheese, parsley, peppers andchorizo and sprinkle with salt and pepper. Add the egg mixture to the pan, moving it around in the pan to help the tortilla to rise. Fry until golden brown, stirring occasionally, until it has set. Transfer to the oven and bake until set, about 15 minutes.
When tortilla is firm, remove from the oven, place a large plate over the pan and flip the tortilla onto it. Cut into wedges and serve.