Place the ground chuck in a large skillet, and season with chili powder, paprika, cumin, salt, garlic powder, and garlic. Pour in enough water to cover. Bring to a boil. Reduce heat to low, and simmer 1 hour. Add more water as necessary during cook time, and break the meat into small pieces.
Mix the bell pepper and onion into the skillet, and continue to simmer 30 minutes. Drain and reserve juices. Skim the fat off the juices(or, if not preparing the tacos right away, place juices in the freezer until fat may be easily removed from the top). Mix 5 tablespoons of the remaining juices back into the skillet with the beef, and cook until heated through.
Serve the beef on the tortillas. Garnish with queso asadero, sour cream, tomato, and lettuce.
