Prepare the Onion: Peel the onion and cut it into a “bloom” by slicing downward from the top without cutting through the root. Gently spread the petals apart to form the flower shape.
Prepare the Coating: In a bowl whisk the eggs until smooth. In a separate bowl, mix together all of your nut crust ingredients - almond flour, grated Parmesan cheese, garlic powder, smoked paprika, salt, pepper.
Coat It in the Onion: Dip the onion in the egg mixture making sure all the petals are covered, then dredge it in the dry mixture. Repeat for better coating.
Bake/Air Fry: Line a baking sheet or air fryer basket with the onion. Brush with oil or melted butter. 375°F (190°C) bake 20-25 minutes, or air fry 18 min to golden.
Serve: Allow 5 minutes to cool off then enjoy warm with a keto-approved dip.