
Creato con AI
Preheat your oven to 400°F (200°C).
Slice the onions thinly.
Heat the olive oil in a large skillet over medium heat.
Add the sliced onions to the skillet and cook, stirring occasionally, until they are caramelized and golden brown, about 25-30 minutes.
Roll out the puff pastry on a lightly floured surface and place it on a baking sheet lined with parchment paper.
Spread the crème fraîche evenly over the puff pastry, leaving a small border around the edges.
Distribute the caramelized onions over the crème fraîche.
Sprinkle the grated Gruyère cheese and fresh thyme over the onions.
Season with salt and pepper to taste.
Bake in the preheated oven for 20-25 minutes, or until the pastry is golden and the cheese is melted and bubbly.
Remove from the oven and let it cool slightly before slicing and serving.