Preheat large non-stick skillet on medium-high heat and swirl 1 tablespoon of oil to coat. Add onion and saute for 1 minute, stirring occasionally.
Add ground meat, taco seasoning and salt. Saute for 7 minutes, constantly stirring and breaking into small pieces with spatula.
Add diced green chiles, diced tomatoes, black beans; stir and bring to a boil. Cover and simmer on low heat for 5 minutes.
Lay tortillas overlapping each a other abit, sprinkle with cheese, turn off heat, cover with a tight lid and let stand for 5-10 minutes.
Sprinkle with lettuce, diced tomatoes and whatever else Mexican topping you like.
Serve hot with desired toppings like cilantro, green onion, avocado, yogurt, salsa etc.
Video
Notes
Store: Refrigerate leftovers in an airtight container for up to 3 days.
Freeze: Up to 3 months.
If using ground beef or pork, I recommend to drain the fat.
Wheat tortillas would work just fine.
If you don't have diced green chilies, use more taco seasoning or chili powder. Also green bell pepper or jalapenos amount to taste and sauteed works. Throw it in with onions.
Add corn, skip beans or tortillas - make skillet yours.