Cooling/Resting Time: 0 minutes
Preheat air fryer to 350F.
Toss trimmed green beans with olive oil in a large bowl until evenly coated.
Add Greek seasoning salt, nutritional yeast, and black pepper, then toss until well coated.
Transfer beans to air fryer basket in a single layer, working in batches if needed.
Cook for 8 minutes, shaking basket halfway through.
Check for golden edges and tender-crisp texture, cooking 1-2 minutes more if needed.
Serve immediately with freshly grated Parmesan if desired.