Ingredients
The following ingredients have 6 Servings
- 1 sheet puff pastry thawed but cold (if frozen, let thaw in the fridge for 24 hours)
- 4 tbsp olive oil, (plus additional as needed (see below))
- 1 large yellow onion, (halved and thinly sliced)
- 1 tsp Kosher salt
- 4 large eggs
- 1 + 1/4 milk whole milk
- 1 cup grated gruyere cheese
- 1 tbsp dijon mustard
- 2 cloves garlic (minced)
- 2 cups sliced shiitake mushrooms, (stem removed, sub baby bella mushrooms)
- ¼ tsp freshly ground black pepper
- 2 cups swiss chard, (stem removed and thinly sliced into ribbons (about 1 bunch))
- 1 tsp fresh thyme leaves, (finely chopped)
