This asparagus tart combines a puff pastry base with Dijon, Boursin, prosciutto, and tender asparagus. It's elegant enough for entertaining, but quick enough for weeknights.
Preheat the oven to 400°F. Open the thawed puff pastry on a lightly floured piece of parchment paper. Roll it out to smooth the seams to an 11 x 14-inch rectangle. Transfer the pastry and parchment to a baking sheet. Using a sharp knife, make a line ½-inch around the perimeter of the pastry, only cutting halfway through, creating a crust. Do not cut all the way through the pastry.
1 14-oz sheet puff pastry
Brush the inside of the cut-line pastry with the Dijon mustard. Crumble the Boursin cheese evenly over the mustard. Lay the prosciutto over the cheese; the pieces can be offset to cover as best as possible. Top with a single layer of asparagus trimmed to fit within the crust from one long side to the other long side. Drizzle with olive oil, and sprinkle with salt, black pepper, and Parmesan cheese.
2 tbsp Dijon mustard, 1 5.2-oz container Boursin cheese, 2 oz prosciutto (about 5 slices), 12 oz asparagus, 1 tbsp olive oil, ¾ tsp kosher salt, ½ tsp freshly ground black pepper, ⅓ cup grated Parmesan cheese
Bake in the preheated 400°F oven until the pastry is puffed and golden brown, 20-25 minutes. Remove from the oven and cool for 5 minutes before slicing and serving.
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Notes
Ensure the puff pastry has been thawed before using. Thawing overnight in the refrigerator is ideal; otherwise, it can get too soft if it thaws at room temperature.To improve the presentation and create an elevated look, trim off the sides of the pastry to create a perfect rectangle. Use a ruler or a straightedge to act as a guide along the side and cut with a pastry wheel.When baking, to check if asparagus is tender and fully cooked, insert a knife into a stalk. If the knife inserts easily with little resistance, then it is ready.