Onion Tart with Gruyere (Print Version)
# Ingredients:
→ Main Ingredients
01 -
2 sheets puff pastry, left to thaw in fridge overnight
02 -
4 cups thinly sliced sweet yellow onions
03 -
1 tablespoon olive oil
04 -
2 teaspoons brown sugar
05 -
1/2 teaspoon kosher salt
06 -
1 cup shredded Gruyere cheese
07 -
2 teaspoons chopped fresh thyme leaves
08 -
2 tablespoons heavy cream
# Instructions:
01 -
Pour oil into a big deep skillet over medium-high heat. Stir onions for 10 minutes till they get soft. Sprinkle in salt and brown sugar, then cook without a lid for another 20 minutes until they turn golden brown. Set aside to cool down.
02 -
Get your oven hot at 400°F. Put parchment on a baking tray, lay down pastry sheets with edges touching and push them together to make one big rectangle. Bend the edges up and poke the bottom with a fork.
03 -
Scatter cheese all over the pastry bottom. Layer the cooled onions on top. Brush some cream on the edges and scatter thyme around.
04 -
Pop in the oven for 18-20 minutes till the cheese gets bubbly and the edges turn golden. Let it sit for 5 minutes before slicing. Add extra thyme on top if you want.
# Notes:
01 -
You can enjoy this warm or cool.
02 -
Make sure the onions cool down before you put them on the cold pastry dough.