Smoked, Spice Rubbed, Texas-Style Brisket on Texas Toast

Name: Smoked, Spice Rubbed, Texas-Style Brisket on Texas Toast
Prep time: 40 min
Cook time: 8 h 40 min
Total time: 9 h 20 min
Cuisine: TexMex, American
Ingredients: 3 tablespoons ancho chile powder; 2 tablespoons kosher salt; 1 tablespoon allspice, ground; 1 tablespoon celery seeds; 1 tablespoon coriander seeds, ground; 1 tablespoon garlic powder; 1 tablespoon mustard seeds, ground; 1 tablespoon dried oregano; 1 tablespoon smoked Spanish paprika; 1 tablespoon freshly ground black pepper; One 8- to 10-pound brisket, untrimmed; 2 cups apple juice (in a spray bottle); Bobby Flay BBQ Sauce or your favorite BBQ sauce, heated; Texas Toast, recipe follows; Pickled Red Onions, recipe follows; 2 teaspoons canola oil; 4 cloves garlic, smashed and chopped to a paste; 4 cloves garlic, smashed and chopped to a paste; 2 sticks unsalted butter, softened; Kosher salt and freshly ground black pepper; 2 loaves good quality Pullman or pain de mie, sliced into 2-inch thick slices; 2 tablespoons finely chopped flat-leaf parsley; 1 1/2 cups red wine vinegar; 2 tablespoons sugar; 1 teaspoon mustard seeds; Kosher salt; 1 small red onion, halved and thinly sliced