Preheat the air fryer. Set it to 380°F (193°C) for 3–5 minutes so the basket is hot when the veggies go in. This helps with browning.
Prep the carrots. Peel and cut into 1/2-inch coins or sticks about 2–3 inches long. Keep pieces uniform so they cook evenly.
Prep the zucchini. Trim ends and slice into 1/2-inch half-moons or sticks.
Pat dry with a clean towel to remove excess moisture. Dry zucchini browns better.
Season. In a large bowl, toss carrots and zucchini with olive oil, salt, pepper, garlic powder, onion powder, paprika, and thyme. Make sure every piece is lightly coated but not greasy.
Load the basket. Spread vegetables in a single layer. A little overlap is fine, but avoid a thick pile. If your air fryer is small, cook in two batches.
Air fry, then shake. Cook at 380°F (193°C) for 10 minutes.
Shake the basket or toss with tongs to redistribute.
Finish cooking. Air fry for 4–8 more minutes, checking at the 4-minute mark. You’re aiming for tender carrots and lightly browned zucchini with crisp edges. Total time is usually 14–18 minutes, depending on your air fryer and cut size.
Brighten it up. Transfer to a bowl.
Add lemon zest and a squeeze of juice. Taste and adjust salt and pepper. For extra richness, sprinkle with Parmesan or chopped parsley.
Serve hot. Enjoy as a side, toss with cooked grains, or layer over hummus for a quick bowl.