Lemon Herb Blooming Onion
Equipment
- medium mixing bowl
- paring knife
- Serving plates
- Small spoon
Ingredients
- ½ teaspoon Black Pepper freshly ground
- 2 cloves Garlic minced
- 2 tablespoons Fresh Lemon Juice
- 2 tablespoons Fresh Parsley chopped
- 6 tablespoons Mayonnaise
- 2 tablespoons Olive Oil
- 2 large Yellow Onions 14 ounces each
- ¾ cup Panko Breadcrumbs
- ½ cup Parmesan Cheese grated
- ½ teaspoon Kosher Salt
- 4 teaspoons Whole-Grain Dijon Mustard
Instructions
- Place the first onion on a cutting board.
- Trim the top from the onion.
- Remove the dry outer skin.
- Keep the root end intact.
- Turn the onion upside down with the root facing upward.
- Use a paring knife to cut vertical slits halfway through the onion at ½-inch intervals.
- Avoid cutting through the root because it holds the onion together.
- Repeat the cutting process with the second onion.
- Turn the onions right side up.
- Gently separate the sections until they open like flower petals.
- Drizzle the cut surfaces with the olive oil.
- Season the onions evenly with kosher salt and freshly ground black pepper.
- Preheat the air fryer to 350°F (177°C).
- Place the onions petal-side up in the air fryer basket.
- Cook for 10 minutes.
- Combine the panko breadcrumbs, Parmesan cheese, mayonnaise, lemon juice, parsley, mustard, and garlic in a medium mixing bowl.
- Stir until a smooth and evenly combined paste forms.
- Carefully remove the onions from the air fryer.
- Use a small spoon to distribute the breadcrumb paste between the onion petals.
- Spread the remaining filling over the tops of the onions.
- Return the stuffed onions to the air fryer.
- Increase the temperature to 375°F (190°C).
- Cook for approximately 5 minutes.
- Check that the centres are tender and the breadcrumb filling is golden brown.
- Cook for another 2 minutes when the centres remain firm.
- Carefully transfer the onions to serving plates.
- Cut each onion in half.
- Serve immediately.
Notes & Wine Advice
Serving Suggestions
Serve half a stuffed onion per person as an appetiser, vegetarian main course, or substantial side dish. A crisp green salad, roasted potatoes, grilled vegetables, or crusty bread can complete the meal. For sharing, place the onions in the centre of the table and separate the petals with a small knife.Recipe Notes
Keep the root end completely intact because it holds the onion petals together. Cut only halfway through the onion and leave a solid section around the root. Large onions may require several additional minutes before their centres become tender.Variations
Replace Parmesan with mature cheddar, Pecorino, or a vegetarian hard cheese. Add chopped basil, thyme, oregano, chilli flakes, or finely chopped olives to the filling. Regular Dijon mustard can replace the whole-grain version when you prefer a smoother texture.Storage
Refrigerate leftovers in an airtight container for up to two days. Reheat them in the air fryer at 350°F until hot and crisp. Microwave reheating is possible, but it will soften the breadcrumb topping and onion petals.Wine Advice
A fresh Sauvignon Blanc complements the lemon, parsley, and mustard while balancing the mayonnaise and Parmesan. A lightly oaked Chardonnay is a rounder choice for the rich breadcrumb filling.Nutrition values
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About Lemon Herb Blooming Onion
Lemon Herb Blooming Onion transforms two large yellow onions into a shareable air fryer dish filled with panko, Parmesan, parsley, garlic, mustard, mayonnaise, and fresh lemon juice. The onions soften and open into petals, while the breadcrumb mixture develops a crisp, golden surface. Each onion is cut in half after cooking to provide four generous portions.
The recipe combines elements of a deep-fried blooming onion with the savoury filling associated with stuffed vegetables. It needs no flour coating, egg wash, or pan of frying oil. Instead, a small amount of olive oil helps the exposed onion surfaces soften and brown in the circulating heat.
Preparing the Stuffed Air Fryer Onion
A stuffed air fryer onion begins with careful cutting. Trim the top and remove the dry outer skin, but leave the root untouched. The root acts as an anchor and prevents the petals from separating completely during preparation and cooking.
Turn the onion upside down before making vertical cuts at regular intervals. Each slit should travel only halfway through the onion. When the onion is turned upright, gently encourage the sections to open. Avoid pulling firmly because the raw inner layers can tear away from the root.
Softening the Onion First
The onions cook for 10 minutes before the filling is added. This first stage gives the dense centres time to soften and creates more room between the petals. Adding the breadcrumb mixture at the beginning could cause it to become too dark before the onion is tender.
Drizzle olive oil over the cut surfaces and season them before placing the onions in the basket. Keep them upright with the petals facing upward. When they lean or tip over, the filling can slide out during the second cooking stage.
Making the Breadcrumb Filling
Panko breadcrumbs provide a lighter texture than fine dried breadcrumbs. Parmesan adds saltiness and helps the topping brown, while mayonnaise binds the dry ingredients into a spreadable paste. Lemon juice, parsley, mustard, and garlic prevent the rich mixture from tasting heavy.
Stir the ingredients until no dry pockets of panko remain. The mixture should hold together when pressed with a spoon. If it seems unusually loose, allow it to stand for several minutes so the breadcrumbs can absorb some moisture.
Stuffing the Onion Petals
Remove the partially cooked onions carefully because both the basket and onions will be hot. Use a small spoon to place the filling between the opened layers. Distribute it throughout the onion rather than concentrating everything on top.
Increase the air fryer temperature to 375°F for the final five minutes. The higher heat browns the exposed breadcrumbs while the centre finishes cooking. Very large or tightly layered onions may need two additional minutes.
Serving Ideas and Variations
Serve the onions as a vegetarian main course with salad and potatoes or use them as a side dish. They also make an unusual addition to a shared appetiser table alongside our Crispy Coconut Shrimp.
Fresh thyme, basil, oregano, or chilli flakes can be added to the filling. Choose a vegetarian alternative to Parmesan when required because traditional Parmesan is produced using animal rennet.
Storage and Food Safety
Refrigerate leftovers within two hours and reheat them until hot throughout. The air fryer restores the topping more effectively than a microwave. Follow current FDA safe food-handling guidance when preparing, cooling, storing, and reheating cooked dishes.
With tender onion petals and a crisp savoury filling, Lemon Herb Blooming Onion delivers an impressive vegetarian dish without the work and excess oil of deep-frying.