Caramelized Onion and Gruyère Tartlets
These Caramelized Onion and Gruyère Tartlets are flaky, buttery, and filled with deeply caramelized onions and rich, nutty Gruyère cheese. They are the perfect appetizer or snack, offering a...
Recipe Saint is a recipe index: we list the ingredients so you can search, save and plan. The full method, times and servings are on the publisher's page at greateasyrecipe.com.
Cooking tools:
- Tart pan
- Pastry brush
- Skillet
- Oven
- Stove
- Baking sheet
- Chef's knife
- Cutting board
- Mixing bowl
- Whisk
- Measuring spoon
- Wooden spoon
- Parchment paper
Ingredients
- 2 large onions (thinly sliced)
- 2 tbsp unsalted butter
- 1 tbsp olive oil
- 1 tsp sugar (optional, to enhance caramelization)
- ½ tsp salt
- ¼ tsp black pepper
- 1 tsp balsamic vinegar (for extra depth, optional)
- 1 sheet puff pastry (thawed)
- 1 cup Gruyère cheese (grated)
- 1 egg (beaten, for egg wash)
- 1 tsp Dijon mustard (optional, for extra tang)
- ½ tsp fresh thyme leaves (for garnish)
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