Place the onions and carrots into the bottom of your slow cooker.
To make the adobo, place the garlic, paprika, cumin, oregano and vinegar into a food blender, and whizz until smooth. Set to one side.
Add a little olive oil to a large frying pan, and brown off the pork shoulder and ribs in batches.
Season with salt and pepper and add to your slow cooker.
Pour the adobo over the meat and add the water. Mix everything together.
Cover and cook on high for an hour, before turning down to low for 8 hours. Adjust cooking times to suit your slow cooker as they are all different!
Serve with rice and salad, or a selection of tapas.