Cuban Beef Empanadas

Name: Cuban Beef Empanadas
Ingredients: 1/2 cup roughly chopped white onion; 1/2 cup roughly chopped green bell pepper; 2 large garlic cloves, roughly chopped; 2 sweet Caribbean peppers (ajicitos dulces or cachucha peppers), seeded and roughly chopped; 1 tablespoon extra-virgin olive oil; 1/2 pound lean ground beef; 1 tablespoon tomato paste; 1/2 teaspoon ground dried oregano; 1/2 teaspoon ground cumin; 1/2 teaspoon fine sea salt; 1/4 teaspoon freshly ground black pepper; 10 store-bought empanada discs, thawed if frozen; 1 egg white; Vegetable oil, for frying