Preheat oven to 400 degrees F. while the oven is pre-heating, lightly coat a large baking sheet with cooking spray. Gently placeeach of the Mission street taco corn tortillas in a single lined row, andlightly salt and coat the top with cooking spray. Bake the tortillas for atotal of 6 minutes, and flip halfway. Immediately remove from oven to cool offand crisp, once finished baking (to avoid burning the tostadas).
While the toastadas are baking, heat up askillet to medium-high, lightly coating with cooking spray. Add ground chicken,onion, taco seasoning, and 1/3 cup of water into mixture and cook the chickenfor about 10-15 minutes until, the water has evaporated, and the meat reachesan internal temperature of 165 degrees F. Make sure to stir frequently.
While the chicken is cooking, take one LaBanderita tortilla and cut that into equal portions, Set aside.