"This is a recipe thrown together based on what I had on hand. My husband loved it and told me to write it down, so here it goes. Let me know what you think. It's a savory little pastry that's fairly hearty and can be spiced a thousand different ways. The base is the turkey, potatoes, and pastry and the cook can make up the rest! I just threw this together without measuring so the measurements are just guesses. Prepare it to taste."
Preheat oven to 400 degrees F (200 degrees C). Grease 2 baking sheets.
Place potatoes into a large pot and cover with salted water; bring to a boil. Reduce heat to medium-low and simmer until softened but not fully cooked, about 5 minutes. Drain.
Cook and stir turkey in a skillet over medium-high heat until no longer pink, about 5 minutes. Reduce heat to medium; stir in potatoes, onion, salsa, Worcestershire sauce, steak sauce, mustard, garlic powder, salt, and pepper. Simmer until sauce is reduced and no longer soupy, 5 to 10 minutes. Stir in cilantro.
Place 1 puff pastry sheet on each baking sheet. Cut pastry into thirds using the fold lines as a guide. Cut each third into 2 rectangles.
Drop large spoonfuls of turkey-potato mixture on one side of each pastry rectangle. Fold pastry over filling and pinch edges to seal.
Bake in the preheated oven until pastry is puffed up and golden brown, about 1 hour.
This is a savory pocket, but I bet it would be good with a rosemary and sage seasoning without the sauces. It could also be good with other types of meat or with a sweeter more barbeque-like sauce as well.