In a bowl, combine flour, granulated sugar, and salt.
Add the cubed butter and mix with a pastry cutter or fork until the mixture resembles coarse crumbs.
Stir in the egg yolk and ice water until just combined. Form the dough into a ball, wrap in plastic wrap, and refrigerate for at least 30 minutes.
Preheat your oven to 350°F (175°C).
On a floured surface, roll out the chilled dough to about 1/8-inch thickness and cut into circles to fit a greased mini muffin tin. Press the circles into the tin to form small crusts.
In a mixing bowl, combine the chopped pecans, brown sugar, corn syrup, vanilla extract, eggs, and a pinch of cinnamon; mix until well blended.
Fill each mini crust with the pecan mixture, being careful not to overfill.
Bake in the preheated oven for 18-20 minutes, or until the filling is set and the crust is lightly golden.
Remove from the oven and allow to cool in the tin for about 5 minutes before transferring to a wire rack to cool completely.
Notes
Serve on a decorative platter, dusted with powdered sugar and garnished with whole pecans.