For the Filling:

1. 1. In a skillet over medium heat, cook diced chicken breasts until golden brown, about 6-8 minutes.
2. 2. Add minced garlic during the last minute to prevent burning.
3. 3. Transfer cooked chicken to a bowl and stir in softened cream cheese and chopped herbs until well combined.

For the Crust:

1. 1. Preheat your oven to 400°F (200°C) and spray a baking dish with nonstick cooking spray.
2. 2. Roll out puff pastry sheets and cut them into squares.
3. 3. Place a generous spoonful of chicken filling in the center of each square.
4. 4. Fold over diagonally and press edges together with a fork to seal.
5. 5. Arrange filled pastries on the baking dish and brush tops with an egg wash (1 egg whisked with water).

For the Sauce:

1. 1. In a small saucepan over medium heat, combine chicken broth and lemon juice.
2. 2. Simmer until slightly thickened.