In a large bowl, mix the masa harina, warm water, and salt until it forms a smooth dough. Cover and set aside.
In a skillet over medium heat, cook the ground pork or beef until browned. Add the onions, green bell pepper, and vegetable oil and cook until the vegetables are tender.
Add the cumin, oregano, black pepper, and paprika to the skillet and cook for 1-2 minutes until fragrant.
Add the chicken broth, diced tomatoes, green olives, raisins, and hard-boiled eggs to the skillet. Stir well and cook for 5-7 minutes until the mixture is thickened.
Preheat a deep fryer or a large pot with vegetable oil to 375°F (190°C).
Take a small ball of masa dough and flatten it with your hands or using a tortilla press. The dough should be about 1/4 inch thick.
Add a tablespoon of the meat mixture to the center of the flattened masa dough. Fold the dough in half and seal the edges by pressing them with your fingers or a fork.
Fry the pastelitos in the hot oil for 2-3 minutes on each side, until golden brown. Remove from the oil and drain on paper towels.
Repeat the process with the remaining masa dough and meat mixture.
Serve the pastelitos hot with your favorite salsa or hot sauce.