Recipe, video and photography provided by Heinen’s partner, Chef Billy Parisi.
Take a timesaving shortcut by using a puff pastry sheet and this onion tart will come together with ease! Rich caramelized onions, Gruyère and a buttery puff pastry create a mix of savory and sweet perfect for any season.
Why You’ll Love This Recipe
- You can serve this tart as an appetizer, light lunch or an addition to a dinner spread.
- Local, greenhouse-grown Thyme works as an ingredient and a garnish to emphasize the savory flavor of roasted onions.
- The combinations are endless. Think about customizing this recipe by adding bacon, mushrooms or tomatoes!
- Cook time:
- Prep time:
- Total time:
- 9 tarts
- 2 tsp. all-purpose flour
- 1 sheet puff pastry (frozen and thawed)
- 1 cup shredded Gruyère cheese
- 3 tsp. chopped fresh thyme
- 1 large or 2 medium size yellow onions (peeled, thickly sliced to look like half moons)
- 2 Tbsp. heavy whipping cream
- 4 Tbsp. unsalted butter (cut into small 1/4" cubes)
- Salt, to taste
- Heinen's Glaze With Balsamic Vinegar Of Modena
- Preheat the oven to 400F.
- Add 1 tsp. of flour onto a clean surface. Place the thawed puff pastry onto the flour and then sprinkle the remaining 1 tsp. over the top of the pastry.
- Roll out the dough until it is roughly 16″x10″ in size. Transfer it to a sheet tray lined with parchment paper.
- Evenly layer on the cheese leaving a 1″ border on the puff pastry.
- Sprinkle 2 tsp. of the thyme over the cheese.
- Next, place the onion halves slightly overlapping one another completely covering the cheese.
- Brush the tops of the onions and puff pastry border with the heavy whipping cream.
- Evenly sprinkle the butter all over the onions.
- Season the onions with salt and bake in the oven for 35-40 minutes or until well browned.
- Garnish with the remaining 1 tsp. of thyme and balsamic glaze.