Place flour in a shallow dish. Season with salt and pepper. Lightly coat pork in flour.
Heat oil in a large, deep frying pan over medium-high heat. Add pork, in small batches, and cook for 3 to 4 minutes or until browned. Transfer to a plate, cover and set aside.
Add onion and garlic to pan. Cook, stirring occasionally, for 3 minutes or until soft. Spoon into slow cooker. Add port, water, prunes, thyme and pork. Stir to combine. Cover and cook for 3 to 4 hours or until meat is tender and sauce is thick.
Notes & tips.
Leg, loin or diced pork are all suitable cuts for this casserole.
You can cook this recipe in a casserole dish. Preheat oven to 150°C and cook, tightly covered, for 4 hours. Alternatively, cook for 3 to 4 hours over a medium-low heat in a saucepan. Check regularly to ensure casserole doesn't stick.