Instructions
Heat 1 T. oil in a pan and sauté the onions on medium low for about 20 minutes or until caramelized.
Season the brisket generously with salt/pepper.
Heat the rest of the oil in a heavy bottom pot and sear the brisket on both sides to brown to a golden crust.
Sprinkle the garlic over the brisket and lay it in the crockpot, fatty side up.
Pile the onions on top of the meat.
Mix broth with 2 sauces and pour over the meat.
Cook on high 4 hours then low for 8 hours.
Shred/slice against the grain for the tacos.