Wash the bell peppers under cool running water, cut in half, remove stems and seeds, and slice into uniform strips about ½-inch wide.

Place sliced bell peppers in the air fryer basket in a single layer, drizzle with olive oil if desired.

Sprinkle salt and black pepper over the peppers, tossing gently to coat evenly.

Preheat air fryer to 400°F and cook the peppers for 15 minutes, shaking the basket halfway through.

Check doneness after 15 minutes, adjust cooking time for softer peppers if desired.

Remove peppers from basket, let them rest, and serve warm or cool for meal prep.