3cupsrhubarb pieces, sliced into 1 1/2 inch pieces on the bias
2tbspsugar plus more for sprinkling
1tbsporange juice
1/8tspground cardamom
1tbspcornstarch
1egg
Topping
2tbspstrawberry jam
1tspwater
Instructions
Preheat oven to 400F. Line a baking sheet with parchment paper.
Roll out the thawed puff pastry dough, it will about a 10x10 inch square or 10x12inch rectangle (approximately). Use a sharp knife to skor around the edge to create a 1 inch border (just make sure not to cut all the way through the dough).
Spread the strawberry jam on the bottom of the tart, leaving a 1 inch border around the puff pastry.
In a bowl mix together the rhubarb pieces, orange juice, ground cardamom, sugar and cornstarch. Let sit for 5 minutes.
Use a spoon to move the rhubarb pieces from the bowl on top of the strawberry jam layer and spread out evenly - drizzle over any extra juices from the rhubarb bowl over the rhubarb in the tart. Fold the border over the filling all around the tart.
Whisk together 1 egg with 1 tablespoon water or milk. Brush this egg wash onto the folded border. Generously sprinkle granulated sugar all around the border over top of the egg wash.
Bake for 40-45 minutes or until the edges of the puff pastry are a deep golden brown and the rhubarb is very tender. Mix together 2 tbsp strawberry jam with 1 tsp water and when the tart comes out of the oven brush the tops of the rhubarb with this jam mixture.
Let the tart fully cool on the baking sheet after brushing the tops of the rhubarb with the jam. Cut and serve with whipped cream or ice cream if desired.
Notes
Can I use frozen rhubarb in this puff pastry rhubarb tart? I don't recommend using frozen rhubarb as it holds too much water. Make sure to use fresh rhubarb stalks cut into rhubarb slices as per the recipe.
Make this quick puff pastry rhubarb tart in the morning if serving for brunch, lunch or dinner. This tart can sit out at room temperature for the day before serving