Heat a cast iron pan on medium, add curry powder & toast for 1-2 mins until fragrant.
In the same skillet, add the diced chicken breasts along with the garlic powder, onion powder, paprika, and Creole seasoning. Stir well to coat the chicken with the spices. Cook the chicken over medium-high heat for 5-7 minutes, stirring occasionally, until it is browned on all sides and mostly cooked through.
Add 2 tablespoons of butter to the pan with the chicken mixture. Once butter has melted add in the 2 tablespoons of flour and stir to combine with the chicken. Cook for 1-2 minutes to create a roux, which will help thicken the sauce later.
Slowly pour in chicken broth & coconut milk, stirring to combine. Let it simmer for 5-7 mins until the sauce thickens.
Stir in frozen peas & carrots, cook until heated through. Season with salt & pepper to taste.
Cut pastry into squares and arrange them over the filling. Whisk egg & water. Brush egg wash over pastry for a golden finish.
Bake for 20-25 mins until the pastry is golden and puffed. Let it cool for 5 mins, then enjoy the creamy goodness!