Rustic Tomato and Caramelized Onion Tart
Dough :
2 sticks very cold butter; cut into small pieces
2 cups all purpose flour
1 teaspoon kosher salt
1 tablespoon sugar
1/4 cup ice water
Onions:
1 onion, thinly sliced
1 tablespoon olive oil
Butter, to brush pie tin
8 tomatoes (feel free to use different types, colors, etc)
2 tablespoons dijon mustard
1 cup shredded gruyere cheese
Kosher salt & Pepper
2 tablespoons, plus 2 teaspoons olive oil
1 large egg; lightly beaten
Fresh basil to garnish
Preheat oven to 375
Put the flour, butter, salt, and sugar into a food processor. Pulse quickly until the butter is the size of peas. Add the ice water in a small stream until the dough just comes together. Empty the bowl and roll the dough into a ball. Wrap in plastic wrap and put in the fridge until needed.
For the onions, heat the olive oil in a skillet over medium heat, then add the sliced onions. Stirring until they turn golden brown. This will take about 10-15 minutes.
Take the dough out of the fridge and, on a surface dusted with flour, roll into a circle. Make sure it is not too thin, or the maters will bleed through the bottom Place on a cookie sheet lined with parchment paperl. Brush the bottom of the tart with the dijon mustard. Then place, in this order, the shredded gruyere cheese, onions, tomatoes (leaving a 2 inch border), salt & pepper, and 1 teaspoon of the olive oil,
Fold the extra dough in around the tomatoes. Brush the dough with the egg. Bake for 30-45 minutes. Right before serving garnish with the basil. Enjoy :)
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