4-5medium red onionspeeled and quartered (keep root ends intact so they hold shape)
2tbspbutter + 2 tbsp olive oil
3tbsphoney
¼cupred wine vinegar
¼cupdry red wine
3 to 4sprigsfresh thymeplus extra for garnish
1sheet puff pastrythawed if frozen
Salt + freshly ground black pepper
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Instructions
Peel and quarter the red onions through the root so they hold together.
Heat butter and olive oil in a 10–12 inch ovenproof skillet over medium heat.
Add onion quarters, cut side down, and sauté 10–12 minutes, until they start to caramelize and soften.
Drizzle the honey over onions and let it bubble for 1–2 minutes. Pour in red wine vinegar and red wine. Season with salt and pepper.
Add thyme sprigs and cook 10–12 minutes, until liquid reduces to a glossy glaze.
Preheat oven to 400°F. Roll puff pastry slightly larger than skillet.
Lay pastry over onions, tucking edges down inside.
Cut 2–3 small slits in the pastry to vent steam.
Bake 25–30 minutes, until pastry is golden and puffed.
Let rest 5 minutes. Place a serving plate over skillet and carefully invert.
Garnish with fresh thyme leaves.
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Notes
To store, let the tarte cool completely, then store it covered in the refrigerator for up to 3 days. To reheat, place slices in a 350°F oven for 10–12 minutes until warmed through and the pastry is crisp again.
Keyword red onion tarte tatin, red wine onion tarte tatin