Preheat the air fryer to 390–400°F (200–205°C) for 3–5 minutes. A hot basket gives you better browning.
Prep the vegetables.
Cut everything into similar-sized pieces: 1-inch florets for broccoli/cauliflower, 1/2-inch coins or sticks for carrots, halved Brussels sprouts, 1-inch chunks for squash and peppers, and 1/2-inch cubes for sweet potatoes. Pat wet veggies dry with a towel.
Toss with oil and seasoning. Use 1–1.5 tablespoons oil per pound of vegetables.
Add 1 teaspoon salt, 1/2 teaspoon black pepper, 1 teaspoon garlic powder, and 1/2 teaspoon onion powder. Add any flavor boosters you like.
Load the basket in a single layer. Avoid crowding.
If needed, cook in two batches for better crisping. A little space between pieces is key.
Air-fry and shake. Cook for 10–16 minutes depending on the vegetable mix.
Shake the basket halfway. Aim for browned edges and fork-tender centers.
Finish strong. Squeeze fresh lemon, drizzle a bit of olive oil, or add grated Parmesan.
Fresh herbs wake up the flavors right before serving.
Make it a meal. Serve over quinoa or brown rice, toss with chickpeas, or add sliced chicken sausage. For a quick bowl, top with a spoonful of Greek yogurt, tahini, or a light vinaigrette.