Blitz Puff Pastry

1. Dissolve the salt into the water. In a food processor, pulse the butter and the flour together until combined, leaving the butter chunks fairly large. Add the water-salt mixture and pulse just until moistened. Flatten dough into a rectangular disc, wrap in plastic and let rest in refrigerator for 30 minutes. On a floured surface, roll out dough to a large rectangle the long side should be horizontal to you. Take the left edge and fold it so it reaches the center. Take the right edge and fold it into the center. Now take the left side and fold the entire thing in half, meeting the right edge, like a book.
2. Wrap in plastic and refrigerate for 30 minutes. You will repeat this two more times, letting it rest for 30 minutes between each fold.
3. After the last fold, let the dough rest in the refrigerator overnight or freeze for future use.

Frangipane

1. In a food processor, cream together the butter, sugar, and almond paste until very smooth. Add the eggs, one a a time, blend until smooth. Add the flour and pulse just until combined.
2. Chill until ready to use.

Assembly

1. Preheat oven to 400 F. Take one book of puff pastry and roll it out on a floured surface to 1/8-1/4 thickness. Cut as many 4 inch rounds as you can fit. With half of the rounds, cut out the center with the next smallest round cutter, this will be the border for your tart. Swipe a bit of water around the edge of one of the whole circles and place the cut circle on top, lining up the edges. With a fork, dock the bottom surface of the tart shell, but do not dock the cut circle edge. This will allow just the edge to puff up around the filling, keeping the bottom of the tart flat to hold the filling in. Arrange tart shells on a sil-pat or parchment lined baking sheet. Chill completely. When ready to bake, place 1-2 tablespoons of frangipane in the inner circle, do not overfill.
2. Arrange a few slices of plum on top of the frangipane. Whisk together the yolk and water and brush the edges of the puff pastry. Sprinkle a bit of turbinado sugar around the edges and on top of the plums.
3. Bake for 20-30 minutes, until the puff pastry is golden brown and the frangipane has set.
4. Let cool completely.
5. Dust with a bit of powdered sugar prior to serving.