Wash the lalo leaves thoroughly and chop them if necessary. If using spinach, wash and chop as well.
Season the pork (or beef) pieces with salt, black pepper, thyme, allspice, and paprika.
Heat vegetable oil in a large pot over medium heat.
Add the seasoned meat to the pot and cook until browned on all sides, about 5-7 minutes.
Remove the meat from the pot and set aside.
In the same pot, add the chopped onion, garlic, bell pepper, and tomatoes. Cook until the vegetables are soft, about 5 minutes.
Stir in the tomato paste and cook for another 2 minutes.
Return the browned meat to the pot and pour in the water or beef broth. If using, add the bouillon powder for extra flavor.
Bring to a boil, then reduce heat and let simmer for about 30 minutes, or until the meat is tender.
Add the lalo leaves (or spinach) to the pot and cook for another 10-15 minutes, until the leaves are tender and well integrated with the meat and sauce.
Adjust seasoning with additional salt and pepper if needed.
Garnish with chopped fresh parsley or scallions before serving.
Enjoy your meal!