In a medium-sized skillet or the pot of the Ninja Foodi, brown the ground beef and add in the taco seasoning per the package instructions. Set aside.
Option 1 - Coat the basket of the air fryer with grapeseed oil spray, then place the tortilla in the air fryer. Coat it with grapeseed oil spray again and cook at 360°F for 3-4 minutes on each side to get a crispy tostada shell.
Option 2 - Add a layer or warm refried beans and meat to the tortilla. Coat the basket of the air fryer with grapeseed oil spray, then place it inside the basket. Cook at 360°F for 6 minutes.
Carefully remove the tostada and top with your additional toppings.
Repeat process for additional tortillas.
Notes
Nutritional information is going to vary based on how many you are making.