Ingredients

  • frozen puff pastry, thawed (about 1/3 sheet , or 3 ounces)
  • 1 tablespoon unsalted butter
  • 1 tablespoon all-purpose flour
  • 1/2 cup milk, plus more if needed
  • kosher salt
  • freshly ground black pepper
  • 2 (6 ounce) cans chunk light tuna in oil, drained
  • 2 tablespoons freshly finely grated parmesan cheese
  • 1 teaspoon finely grated lemon zest
  • 2 teaspoons fresh lemon juice, plus more to taste

Method

  • Preheat oven to 400°; on a lightly floured surface, roll the dough lightly just to smooth it, then cut it into two pieces, each about 3 by 4 1/2 inches.
  • Put pastry on a small baking sheet and bake in the hot oven until puffed and nicely browned, 20 minutes.
  • Meanwhile, in a small saucepan, melt the butter over medium heat.
  • Add in the flour and whisk until smooth, then whisk for about 30 seconds.
  • Add in the milk, whisk vigorously until the sauce is smooth, then reduce the heat to low and cook, whisking often, another 2-3 minutes to cook off the floury taste.
  • Season generously with salt and pepper, or lemon juice to taste.
  • The tuna should be creamy and loose, but not runny.
  • Add a little more milk, and reheat gently, if necessary.
  • Split the pastries in half horizontally, with your knife parallel to the work surface, as though you were splitting open a sandwich roll, and put the bottoms on two small plates.
  • Spoon the creamed tuna on the base, then cover with the top; serve immediately.