Spray the air fryer basket with oil and set aside.
Place the sliced onion rings in a medium sized bowl
Start by preparing the buttermilk, pour the almond milk and lemon into a medium sized bowl and allow it to congeal for 5 minutes.
Add all of the listed ingredients for the batter in the bowl with the buttermilk and beat into a smooth batter then place it directly next to the onion rings.
In another bowl add all of the ingredients for the breading and thoroughly combine so the seasoning is evenly mixed in. Leave a teaspoon in the bowl as you will need this to transport the onion ring into the basket. Then place this bowl next to the bowl of batter.
Place your air fryer basket towards the end, next to the breading bowl.
Take each (use a pinching motion with index finger and thumb) onion ring and dip in the batter, you may need to dip a few times to ensure the batter is completely applied. Double check the batter has adhered and shake off any dripping batter before moving onto the next step.
Still holding the battered onion ring in a pinching motion, place the onion ring on the breading. Now spoon the breading onto the ring (DON'T ROLL), toss the breading inside the inner rim too. Flip the onion ring over if you need to ensure it's fully coated. It should stick without dislodging and shake off any excess crumbs
Place the spoon inside the onion ring and carefully place it on the spoon so it balances.
Carefully lower the onion ring into the fryer basket and repeat with the rest of the onion rings.
Spray the top of the onion rings
Place the basket in the air fryer, set the unit 190C/375F for 8-10 minutes. Turn half way through