Caramelized Onion Quiche Recipe from Jessica Seinfeld - Jessica Seinfeld

Ingredients

• For the crust:
• 1¼ cups all-purpose flour, plus more for work surface
• ½ teaspoon kosher salt
• ½ cup (1 stick) cold unsalted butter, cut into small pieces
• For the filling:
• 2 yellow onions
• 2 tablespoons extra virgin olive oil
• 2 tablespoons unsalted butter
• 1 teaspoon kosher salt
• 2 teaspoons fresh thyme leaves
• 5 large eggs
• 1½ cups half-and-half
• ⅛ teaspoon freshly ground black pepper
• 1 cup grated Gruyere cheese