Make the dough: In a bowl, whisk together flour, curry powder, sugar, and salt. Cut in cold butter until the mixture resembles coarse crumbs. Slowly add ice water, stirring until dough just comes together. Form into a ball, wrap in plastic, and chill for 20 minutes.
Prepare the filling: Heat oil in a skillet over medium heat. Sauté onion until soft, add ground beef and pepper, cooking until browned. Drain excess fat if needed. Stir in seasoning salt, garlic powder, onion powder, thyme, curry, soy sauce, bouillon, and water. Simmer until rich and slightly saucy. Season to taste and let cool for 30 minutes.
Form the patties: Preheat oven to 425 °F. Roll dough into an even thickness and cut into 8 circles. Place ~2 tablespoons of cooled filling into each circle’s center. Brush edges with egg wash, fold to seal, and crimp with a fork. Place on a parchment‑lined baking sheet. Prick tops lightly, brush with egg wash.
Bake: Bake patties for 20–25 minutes until golden brown and flaky.
Cool & serve: Let them rest a few minutes before serving warm.