"Create a slow-cooked Mexican-style diced beef recipe for 1 kilogram of beef, suitable for tacos. Use a variety of dry chillies and fresh chillies for depth and heat. Avoid smoked paprika unless absolutely necessary. Make it flavorful, balanced, and home-cook friendly, with metric units. Include a rich sauce that can be shredded or spooned into tacos, and suggest optional taco-serving accompaniments. Keep it from relying on ultra-processed shortcuts."