Step 1

Heat olive oil in a medium-size sauté pan.  Add onion and cook until translucent.  Stir in meat until heated.  Meanwhile, combine balsamic, mayonnaise and Tajin in a small bowl.  Warm tortilla shells by placing them directly on a stove burner (for gas), or in a medium sauté pan (for electric) until heated with a little char on the tortilla.

Step 2

To assemble layer meat and onion mixture, tomato and lettuce on a heated tortilla. Top with a drizzle of aioli sauce and lime juice.