Preheat oven to 425ºF. Line a large baking sheet with parchment.
Warm oil in a skillet over medium heat. Sauté onion until softened, about 5 minutes. Stir in garlic; sauté 1 minute. Increase heat to medium-high, add turkey and cumin; cook, stirring, until no longer pink, 5 minutes. Stir in 3 Tbsp. water, raisins and olives. Season with salt. Let cool.
Spoon about 2 Tbsp. filling onto dough discs. Moisten edges with beaten egg, fold, and press edges with a fork to seal. Transfer to baking sheet; brush with remaining egg.
Bake until golden, about 20 minutes. Serve warm.