Place bell peppers, onions, oil, salt, and pepper in the Big Batch Container, then toss gently to combine.
Place the adapter on the container, then install the CRISPi PowerPod in the adapter. Press MODE until AIR FRY illuminates, set time to 30 minutes, and press START to begin cooking.
Season steak with salt and pepper as desired.
When 23 minutes remain on the timer, remove PowerPod and place steak over peppers and onions. Replace PowerPod and press START to resume cooking.
Every 3–4 minutes, remove PowerPod and toss steak, peppers, and onions to ensure even cooking.
When 1 minute remains on the timer, remove PowerPod and place cheese slices in a single layer over steak mixture, then replace PowerPod and press START to resume cooking.
When cooking is complete, serve cheesesteaks on toasted sub rolls.
