Add the oil to a large skillet over medium-high heat. Add the onion and leave it to sweat for about 5 minutes.
Next, add the bell pepper and allow it to cook for a minute or two.
Finally, add the minced garlic and fry it for a minute.
Once the garlic has been fried, break up the beef mince and add it to the pan. Allow it to become brown for a couple of minutes.
Add the adobo, black pepper, pregano, and sazon. Mix the ingredients well so that the flavors are distributed well. Allow the flavors to cook for a minute or two.
Next, add the tomato sauce and stock. Bring the mixture to a boil. Then, reduce the heat and allow it to simmer for about 15 minutes. Most of the liquid should evaporate.
Once your beef picadillo is ready, stir in lime juice and the freshly chopped cilantro.
Allow the beef filling to cool completely before using it in your Pasteles en Hoja recipe.