Preheat the oven to 400°F.
In a skillet, sauté the chopped onion, minced garlic, and chopped bell pepper in olive oil until they become soft.
Add the ground beef to the skillet and cook until it is browned, breaking it into small pieces as it cooks.
Stir in the tomato paste along with the cumin, paprika, and chili powder; season with salt and pepper to taste.
Allow the beef filling to cool slightly while you cut the pastry sheets into circles.
Take each pastry circle and fill it with the beef mixture, then fold it over and seal the edges with a fork.
Brush the tops of the empanadas with the beaten egg and place them on a baking sheet.
Bake in the preheated oven for 20–25 minutes, or until the empanadas are golden brown and flaky.