Wash and slice the pepper, zucchini, mushrooms, and onion so that they are all similar in size.
Combine the garlic powder, onion powder, dried parsley, ground cumin, and salt and pepper in a small bowl. Add the red pepper flakes if using.
Toss the vegetables with the seasonings and olive oil.
Preheat the air fryer to 380 degrees and cook the vegetables in a single layer for 8-10 minutes, flipping the veggies halfway through the cooking time.
Video
Notes
After washing the veggies, use a paper towel to dry them and remove any excess moisture so the oil and seasonings will stick.
Let the air fryer fully preheat before adding the vegetables for the best results.
Always flip the veggies with tongs or a spatula halfway through the cooking time so they cook evenly and crisp up on all sides.
Store leftovers in an airtight container in the refrigerator for up to 5 days.
Reheat leftovers in a preheated air fryer at 350 degrees F for 3–4 minutes until warmed through.
This nutrition information is based on the exact products I used in this recipe. Brands and sizes of products could alter exact nutrition and should always be calculated independently.