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Preheat your oven to 350°F (175°C).

Generously coat the bottom and sides of a small, oven-safe, round pan (approximately 8-9 inches in diameter) with the softened unsalted butter.

Sprinkle the granulated sugar evenly over the buttered bottom of the pan.

Arrange the halved Roscoff onions cut-side down in a circular pattern over the butter and sugar, ensuring they fit snugly.

Place the pan over medium-high heat on the stovetop. Cook for 5-7 minutes, or until the butter and sugar begin to caramelize and bubble around the edges of the onions.

Carefully pour the sherry vinegar over the onions in the pan. Continue to cook for another 1-2 minutes, allowing the vinegar to reduce slightly.

Carefully place the round puff pastry sheet over the onions, pressing down gently to cover them completely. Score the center of the pastry with a small 'X' using a knife to allow steam to escape.

Transfer the pan to the preheated oven and bake for 15 minutes, or until the pastry is golden brown and puffed.

While the tarte is baking, prepare the crème fraîche dressing. In a small bowl, combine the crème fraîche, lemon zest, lemon juice, chopped chives, and chopped parsley. Stir well to combine.

Once baked, carefully remove the tarte from the oven. Let it cool in the pan for 2-3 minutes.

Place a serving plate upside down over the pan. Using oven mitts, carefully and confidently invert the tarte onto the plate. If any onions stick, gently re-arrange them.

Finish the Tarte Tatin with a sprinkle of Maldon sea salt and freshly cracked black pepper.

Serve the Tarte Tatin warm, with a dollop of the herb crème fraîche dressing on the side and a fresh green salad, if desired.


Preheat your oven to 350°F (175°C).

Generously coat the bottom and sides of a small, oven-safe, round pan (approximately 8-9 inches in diameter) with the softened unsalted butter.

Sprinkle the granulated sugar evenly over the buttered bottom of the pan.

Arrange the halved Roscoff onions cut-side down in a circular pattern over the butter and sugar, ensuring they fit snugly.

Place the pan over medium-high heat on the stovetop. Cook for 5-7 minutes, or until the butter and sugar begin to caramelize and bubble around the edges of the onions.

Carefully pour the sherry vinegar over the onions in the pan. Continue to cook for another 1-2 minutes, allowing the vinegar to reduce slightly.

Carefully place the round puff pastry sheet over the onions, pressing down gently to cover them completely. Score the center of the pastry with a small 'X' using a knife to allow steam to escape.

Transfer the pan to the preheated oven and bake for 15 minutes, or until the pastry is golden brown and puffed.

While the tarte is baking, prepare the crème fraîche dressing. In a small bowl, combine the crème fraîche, lemon zest, lemon juice, chopped chives, and chopped parsley. Stir well to combine.

Once baked, carefully remove the tarte from the oven. Let it cool in the pan for 2-3 minutes.

Place a serving plate upside down over the pan. Using oven mitts, carefully and confidently invert the tarte onto the plate. If any onions stick, gently re-arrange them.

Finish the Tarte Tatin with a sprinkle of Maldon sea salt and freshly cracked black pepper.

Serve the Tarte Tatin warm, with a dollop of the herb crème fraîche dressing on the side and a fresh green salad, if desired.
