Below is the recipe for an upscale taco I've served. Authentic probably not but beautiful? Yes. Tasty? Yes. They are very small and more like an appetizer than a street food. We made our own corn tortillas for this.
For the Shells:
10 3" Corn Tortillas
Oil for frying
Drop the tortillas one by one directly on the oil. Push it down into the fat with the side of a pair of forks such that the shell will have a squarish bottom that might stand on its own. Remove the shells when crispy.
For the Guacamole:
flesh from 2 avocados
juice from 2 limes
1/4 of a big onion diced
8 cilantro leaves
1 oz of queso oaxaca
~1/2 oz of olive oil
2 ripe tomatoes, peeled, seeded and finely diced
Blend avocado, lime juice, onion, cilantro, and cheese in a food processor. Add the oil and and blend until emulsified. Season with salt and remove from food processor. Fold in the tomato.
For Fried Pork Belly:
12 oz of pork belly
1 c water
1/2 c AP flour
1 c olive oil
Place pork and water in pressure cooker and cook at 15 psi for 1/2 hour. (1.5 hours boiling covered in water without a pressure cooker) Let it cool. Remove the fat and fray the pork into very thin threads. Flour the pork belly threads and fry in olive oil at 345 degrees F. Drain on paper towels and season with salt.
To assemble the dish spoon or pipe guacamole into the shells, heaping fried pork belly threads on top.