Steps:

• If using dried black-eyed peas, put them in a large pot and cover with about 4 inches of water. Soak the peas overnight, then drain the water and rinse. Alternatively, you can "quick-soak" the peas by bringing them and the water to a boil for 2 minutes. After this, remove them from the heat, cover the pot and soak the peas for 1 hour. Then, drain and rinse the peas.
• Heat the oil in a large pot over medium-high heat. When the oil is shimmering, add the pork. Sear until the pork is browned on all sides, 4 to 5 minutes. Add the bacon, onion and garlic to the pot and cook, stirring, until the onion and garlic are lightly browned, about 6 to 8 minutes. Add the salt, black pepper, cayenne and garlic powder. Cook until the entire mixture is coated with the spices, about 2 minutes. Pour in the stock and water and drop in the bay leaves. Bring the mixture to a boil, then reduce the heat and simmer, covered, for about 30 minutes.
• When the pork begins to fall apart, add the prepared peas to the pot and simmer until the peas are very soft, about 1 to 1 1/2 hours (see Cook's Note).
• Taste for seasonings, and add some hot-pepper vinegar, if desired. Discard the bay leaves and transfer the black-eyed peas to a serving bowl.

Steps:

• Place the ham bone, onion, tomatoes, kidney beans, potatoes, and green pepper into a 3 quart or larger slow cooker. Dissolve the bouillon cubes in water, and pour into the slow cooker.
• Cover, and cook on High until warm. Reduce heat to Low, and continue to cook for 5 to 6 hours.