In a large skillet, heat the oil. Season the pork with salt and pepper to taste. Add half of the pork to the skillet and brown it over MEDIUM HIGH heat for 12 minutes. Transfer the pork to the crock cooker. Repeat with the remaining pork.
Pour off all but 2 tablespoons of the fat in the skillet. Add the onion, garlic, ginger, curry, cumin and turmeric and cook over LOW heat, stirring, until fragrant and the onion is softened for 5 minutes. Add the mixture into the crock cooker.
Add the tomatoes and their juices, coconut milk and broth, cover and cook on HIGH for 4 hours. Spoon off as much fat from the surface of the stew as possible.
Garnish with cilantro and serve.