In a saucepan heat, heat the tamari, brown sugar, ginger, and garlic over medium heat for 10 minutes. Set aside.
In a mixing bowl, add ¼ sauce to chicken and mix until thoroughly coated.
Preheat oven to 375 degrees F.
Prepare a large baking sheet with parchment paper.
On a lightly floured surface, unfold puff pastry sheet.
With a floured rolling pin, roll the pastry out until less than a ¼ inch thick. And measures about 18” by 18”.
Using a pizza cutter, cut diagonally to create 12 diamonds.
In the center of each diamond-shaped pastry, poke with a fork or skewer in a circular shape.
Repeat with second pastry sheet.
Using a basting brush, brush sauce onto each diamond-shaped pastry. And place on the baking sheet.
Place a tablespoon of chicken into the center.
Optional- Sprinkle with sesame seeds.
Bake for 18 minutes, or until golden brown.
Optional- Garnish with chives. Serve.