Cook onion in oil over medium heat for 3 to 4 minutes until soft, then add garlic and cook briefly until fragrant.
Add ground beef and cook 6 to 8 minutes until fully browned. Drain excess fat.
Stir in spices and seasonings until evenly coated.
Add tomato sauce and beef broth, then simmer on medium low for 5 to 7 minutes until thick. Let cool slightly.
Preheat oven to 400°F and line a baking sheet with parchment paper. Arrange empanada discs on a clean surface.
Spoon 2 to 3 tablespoons filling onto each disc, fold, seal edges, and crimp with a fork.
Brush with egg wash and bake 22 to 25 minutes until golden.
Cool briefly before serving.