Step 1

Preheat air fryer to 360°F for 10 minutes. Generously coat the fryer basket with cooking spray. Toss plantains with 1 tablespoon oil in a medium bowl. Working in batches if necessary, arrange the plantains in a single layer in the fryer basket. Cook for 5 minutes; flip the plantains and continue to cook until crispy and well browned, 6 to 8 minutes more. Carefully transfer plantains to a cutting board.

Step 2

Using the flat bottom of a small bowl or skillet, smash each plantain slice into a flat disk (about 1/4-inch thick); transfer to a medium bowl. Toss the smashed plantains with the remaining 1 tablespoon oil. Working in batches if necessary, return the plantains to the fryer basket, arranging in a single layer. Cook until crisp in spots, 5 to 7 minutes. Sprinkle with salt and serve immediately.