Preheat the Air Fryer: Set the air fryer to 375°F (190°C) and let it preheat for 3-5 minutes.
Prepare the Vegetables: In a mixing bowl, toss the frozen vegetables with olive oil (or spray them lightly with cooking spray). Season with salt, pepper, and any additional spices of your choice.
Air Fry: Place the seasoned vegetables in the air fryer basket, spreading them out in a single layer for even cooking. Cook for 10-15 minutes, shaking the basket halfway through to ensure uniform crispiness.
Check for Doneness: After the cooking time is up, check the vegetables. If they are not crispy enough, continue cooking for an additional 2-3 minutes.
Serve: Once the vegetables are golden and crispy, remove them from the air fryer and serve immediately.