Step 1

Preheat the air fryer to 350 degrees F (180 degrees C).

Step 2

Cut onions in half from root to stem; cut each half into thirds. Combine onions and bell peppers in a medium bowl. Add olive oil, Italian seasoning, salt, and pepper; toss to combine. Transfer vegetables into the air fryer basket and set the sausage links on top without touching one another.

Step 3

Air fry for 15 minutes. Turn sausages and air fry for another 10 minutes.

Step 4

Place each sausage in a bun and top with vegetables and provolone cheese.