Easy Caramelized Onion Tart: A Crowd-Pleasing Appetizer - BoredMom

Ingredients

• 1/3 cup unsalted butter, cold and cubed
• 1 cup all-purpose flour
• 1 pinch of salt
• 3 tablespoons ice cold water
• 2 tablespoons unsalted butter
• 2 large red or yellow onions, thinly sliced
• 2 tablespoons balsamic vinegar
• 3 sprigs fresh thyme, leaves picked
• 1/3 cup crumbled feta cheese (optional)
• Fresh basil (optional, for garnish)
• Balsamic reduction sauce (optional, for garnish)
• Transfer the dough to a lightly floured surface and shape into a disc. Wrap in plastic wrap and refrigerate for at least 30 minutes, or up to 1 hour.
• Preheat oven to 350°F (175°C).
• On a lightly floured surface, roll out the dough to a 1/4-inch thickness. Transfer the dough to a baking sheet lined with parchment paper. Prick the bottom of the dough with a fork a few times.
• Bake the crust for 12 minutes, or until golden brown but still slightly soft. Remove from the oven and let cool slightly.
• Once caramelized, remove the onions from the heat and set aside to cool.
• Bake for an additional 12-14 minutes, or until the filling is heated through and the crust is golden brown.
• Let the tart cool slightly before serving. Garnish with fresh basil and a drizzle of balsamic reduction sauce (both optional).
• Feel free to use a store-bought gluten-free pie crust if needed.
• The tart can be served warm or at room temperature.
• Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven before serving.