Heat the oil in a heavy bottom sauté pan, dutch oven, or cast iron skillet over medium heat. Season the brisket with salt and pepper. Sear the brisket, flipping once, just until golden brown. Transfer to your slow cooker.
Add the onion, fennel, carrots, celery, rosemary, garlic, bay leaves, red wine, and soy sauce/aminos/salt to your slow cooker. Cover and cook on low until tender, 6-8 hours. Let rest for 20 minutes with the slow cooker on warm.
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Notes
Make sure you season well and sear the brisket before slow cooking. Searing the brisket helps keep it juicy and locks in flavor!Leave the soft fat on the brisket. The fat adds flavor and tenderness, especially the fat that is marbled inside the cut of meat. Trim off the hard fat.To make this recipe in an Instant Pot using the slow-cooker setting, you would follow all the same steps as if you were making it in a slow-cooker. See blog post for directions and things to consider.Does your slow cooker get too hot? Use a timer that plugs into the outlet, and plug the slow cooker into the timer ($9). Then, set the timer so that every other tick is off. It helps keep the slow cooker lower than the low setting. If you have an older crockpot, no need to do this.You can use kosher for Passover soy sauce. This recipe also works with salt instead of soy sauce. Season to your own preference.