1. Dice and cook onion for 2-3 minutes.
2. Add spices (cumin, chili powder, garlic powder, salt) and green chilis - combine and cook for another 2-3 minutes.
3. Stir in salsa and chicken.
4. Oil your baking sheet and add the filling to the tacos with some cheese.
5. Bake at 425°F for 8-12 minutes; for crispier tacos, keep in for longer and spray extra oil on each side of the taco.