Short Answer:

To cook multiple vegetables at once in an air fryer, cut them into similar sizes for even cooking. Lightly coat all pieces with oil and seasonings, then arrange them in a single layer with space for airflow.

If cooking larger quantities or vegetables with different cooking times, consider adding quicker-cooking items later or using separate baskets. Shaking or turning halfway ensures all vegetables cook evenly and develop crisp, tender, and flavorful results.

Detailed Explanation:

Cooking Multiple Vegetables at Once

Air frying multiple vegetables together is convenient, but proper preparation is essential to ensure even cooking. Start by washing and cutting all vegetables into similar sizes. Uniform pieces cook at the same rate, preventing some vegetables from burning while others remain undercooked. For example, cut carrots, zucchini, and bell peppers into comparable sticks or chunks to balance cooking times.

Coating and Seasoning
Lightly toss the vegetables in a small amount of oil to help crisp the surfaces and allow seasonings to stick. Salt, pepper, paprika, garlic powder, or dried herbs can be used to enhance flavor. Proper coating ensures that all pieces roast evenly and prevents sticking or uneven browning during air frying. Avoid excessive oil, which can make vegetables greasy and reduce crispiness.

Arranging in the Basket
Arrange the vegetables in a single layer with space between each piece. Overcrowding restricts hot air circulation, which may result in uneven cooking or soggy vegetables. For larger batches, use multiple baskets or cook in batches. Harder vegetables that require longer cooking times, like carrots or potatoes, should be placed in the basket first. Softer vegetables, such as zucchini or bell peppers, can be added later or on top to prevent overcooking.

Temperature and Cooking Time
Set the air fryer to 180–200°C (350–400°F) depending on the types of vegetables. Cooking times will vary based on the density of each vegetable. For mixed vegetables, check progress midway through cooking and shake or turn the basket to ensure even exposure to hot air. Adjust the timing as needed to prevent some vegetables from burning while others remain undercooked.

Shaking and Turning
Shaking or turning the vegetables halfway through cooking allows hot air to circulate around all sides. This step promotes even browning, reduces sticking, and helps achieve the desired crisp exterior while keeping interiors tender. Pay special attention to vegetables that cook faster, moving them away from direct contact with thicker or denser vegetables if necessary.

Serving and Flavor Tips
Once cooked, the mixed vegetables can be served immediately as a side dish, added to grain bowls, pasta, or salads. You can also finish with a squeeze of lemon juice, fresh herbs, or grated cheese to enhance flavor. Proper preparation and seasoning before cooking ensure balanced taste and texture for all vegetables in the mix.

Conclusion

Cooking multiple vegetables at once in an air fryer requires uniform cutting, light oil coating, single-layer arrangement, and proper temperature control. Shaking or turning halfway through ensures even cooking, while adjusting timing for different vegetables prevents overcooking or undercooking. Following these steps produces mixed vegetables that are tender, crispy, flavorful, and visually appealing, making air frying a convenient and healthy method for preparing a variety of vegetables simultaneously.