Slow-Cooker Cod with Tomato-Balsamic Jam

Cook the pancetta in a nonstick skillet over medium, stirring occasionally, until crisp, about 5 minutes. Transfer the pancetta and drippings to a 5-quart slow cooker. Add the onion, tomatoes, vinegar, and honey, stirring to combine. Partially cover, and cook on HIGH until the mixture is syrupy and jam-like, about 4 hours.

Stir together the thyme and black pepper in a small bowl. Sprinkle over the cod fillets. Place the fish on the tomato mixture in the slow cooker; cover completely, and cook on LOW until the fish flakes easily with a fork, about 25 minutes. Serve the cod with the tomato jam; sprinkle with the parsley, if desired.