Ingredients
- 5-7 medium sized onions (about 2 pounds), thinly sliced
- 3 Tbsp butter
- 2 Tbsp olive oil
- 2 eggs
- 1/2 cup heavy cream
- 1-2 tsp freshly ground black pepper
- fresh thyme and parsley, finely minced (if desired)
- 1 sheet puff pastry, thawed
- 1-2 small spring onions with some green still attached, trimmed, and sliced very thinly lengthwise (if desired)
- salt to taste
- Preheat oven to 375º.
- Roll out the sheet of puff pastry on a lightly floured surface so it fits inside a pie pan with some overlap around the edges. Lightly butter or oil a pie dish and place the dough with the edges draped outward.
- In a large bowl, beat the eggs, heavy cream, salt, pepper, until combined. Add the onions and stir until fully combined.
- Pour the mixture into the pastry crust, fold the pastry edges over the top if needed, then top with fresh onion slices, if using, and a pinch of salt. Bake until crust and top are browned. Removed from oven and let cool until set enough to slice and serve.