Onions and blueberries? If you think these two don’t go together, think again. Onions and blueberries both contain sugar, but you need to cook the onions low and slow to release these sugars (a process known as caramelization). While blueberries can taste sweet raw, they taste even better when they are cooked because the moisture gets released, leaving behind an indulgent pop of flavor. We’ve married these delectable flavors together, and balanced it with the tanginess of goat cheese to give you the best savory, summer tart you have ever had.
Ready in 1 hour; Serves 6 as an appetizer
- 1 tablespoon olive oil
- 1 large yellow onion, thinly sliced
- Pinch of salt
- 1 puff pastry sheet, thawed
- ¼ cup goat cheese
- ¾ cup blueberries
- 1 egg
- Handful basil, thinly sliced
Heat a large skillet over medium heat. Add the olive oil to the skillet, swirling around to coat the bottom of the skillet. Stir in the onions and the salt and cook for 1-2 minutes. Lower the heat to medium low, and allow the onions to cook for 30 minutes.
While the onions are cooking, you only want to stir them 2-3 times (once at the 15 minute mark, and once or twice during the last 5 minutes) to ensure proper caramelization. Once the onions have completely caramelized, remove them from the heat and set aside to cool.
Preheat the oven to 400℉. Unroll the puff pastry sheet out onto a lined baking sheet. Using a knife, score a border ½-inch from the edge of the puff pastry dough, making sure not to cut all the way through the dough. Spread the caramelized onions over the dough. Sprinkle the goat cheese and blueberries on top of the onions.
In a small bowl, create an egg wash by beating the egg with a splash of water. Using a pastry brush, brush the egg wash onto the border of the dough. Bake the tart for 20 minutes or until the dough is golden in color. Remove from the oven and let cool for 5-10 minutes. Sprinkle the basil on top, cut into squares, and enjoy.
- The onions can be caramelized 1-2 days prior to making the tart and stored in an airtight container in the fridge.