Chivito Sandwich

Steps

1. Begin by preparing the brioche buns: heat milk with butter and molasses until the butter melts. Then, mix in cold water and egg.
2. In a separate large bowl, combine bread flour, salt, and yeast. Add the milk mixture and stir with a wooden spoon until just combined. There's no need to knead the dough; simply cover it with a damp towel and refrigerate overnight.
3. The next day, knead the dough briefly on a floured surface and divide it into eight equal portions. Shape these into balls and place them on a parchment-lined baking sheet. Cover with a towel and let rise for about an hour until doubled in size.
4. Preheat the oven to 220°C (428°F). Brush the buns with egg wash, milk, or heavy cream and sprinkle with sesame seeds if desired. Bake for 15-20 minutes or until golden brown. Allow to cool.
5. For the filling, chop the onions and sauté in butter until caramelized, about 10-15 minutes. Rub the sirloin steak with garlic and grill or fry it along with bacon and eggs, seasoning with salt and pepper. Toast the halved buns.
6. Spread mustard on one half of each bun, then layer with steak, a slice of ham, a slice of mozzarella, a strip of bacon, a slice of tomato, and some lettuce. Top with a fried egg and drizzle with chimichurri sauce and some caramelized onions just before serving.