Caramelized Onion Tart With Olives

• 1 tablespoon unsalted butter
• 2 tablespoons extra virgin olive oil
• 2 medium onions, thinly sliced
• 2 tablespoons fresh thyme leaves
• all-purpose flour, for dusting
• 1 sheet frozen puff pastry, thawed
• 14 cup oil-cured black olive, pitted and halved lengthwise
• 4 -6 anchovies, fillets. (optional)

1. Preheat oven to 425F Melt butter with oil in a skillet over medium-high heat.
2. Add onion and thyme, and cook until onions are golden and soft about 10 minutes.
3. On a lightly floured surface, roll out pastry, and trim to 8 1/2 x 15 rectangle.
4. Place on a parchment lined baking sheet, transfer to oven, and immediately reduce oven to 400F Bake until pastry begins to rise, about 12 minutes.
5. Arrange onions in a single layer over pastry, leaving a 2-inch border around edge.
6. Top with olives and anchovies (if using) .
7. Bake 15 minutes.
8. Reduce heat to 375F and baked until puffed and golden brown, about 15 minutes more, (tent with foil if crust browns too quickly.)
9. Cut into squares.

unsalted butter, extra virgin olive oil, onions, thyme, flour, pastry, oilcured black olive, anchovies

Taken from www.food.com/recipe/caramelized-onion-tart-with-olives-374831 (may not work)