Use a sharp knife to trim the stem end from the brussels sprouts and remove any discolored leaves. Wash the brussels sprouts in a colander under cold water. Pat dry with a kitchen towel.
Add the brussels sprouts to a mixing bowl. Add the soy sauce, honey, olive oil, lemon juice, chopped garlic, red pepper flakes, salt and pepper to the bowl. Toss to coat the brussels sprouts.
Add brussels sprouts to the basket of the air fryer. Set the temperature to 380 degrees and air fry for 12 minutes.
Remove the basket at the halfway point to shake the brussels sprouts around to help them cook evenly.
When finished cooking, transfer brussels sprouts to a serving bowl and garnish with lemon zest and fresh parsley. Serve immediately while Brussels sprouts are still crispy and fresh.
Notes
Reduce the red pepper flakes (or omit) if you want less heat. As is, these just have a little kick but aren't overly spicy.Store leftover brussels sprouts in an airtight container for 3-4 days. They will not be as crispy but will still be tasty. Reheat in the air fryer for 2-3 minutes.