For the Pork Chorizo: In a spacious bowl, combine pork mince, salt, black pepper, smoked paprika, nutmeg, minced garlic, and red wine. In the center of this mixture, place a small ovenproof dish. Light the charcoal until it's hot, then place it in the dish. Drizzle the teaspoon of oil over the hot charcoal to generate smoke. Quickly cover the bowl to trap the smoke, letting the meat infuse for around 20 minutes.
For the Chimichurri: In a separate bowl, mix oregano with red chili flakes and hot water. Allow it to sit for about 2 minutes to rehydrate. Incorporate the minced garlic, chopped parsley, red wine vinegar, optional lemon juice, olive oil, and salt, stirring well to combine.
Toasting Bread: Generously butter your bread slices. Heat a cast iron pan over medium-low heat. Lay the bread, buttered-side down, in the pan. Toast until golden and then flip to toast the other side.
Cooking Chorizo: On one toasted slice, spread an ample amount (around 150 grams) of the pork chorizo mixture. Using the same cast iron pan, heat a touch more oil over medium-low. Place the sandwich, chorizo side down, into the pan. If you have a sandwich press, it’s ideal to place it on top to ensure even cooking. Cook until the pork chorizo is thoroughly done.
Assemble: Once the pork is cooked through, spread a generous dollop of chimichurri over the chorizo. Top it with the other toasted bread slice. Slice the sandwich in half for easier eating and enjoy!