Hearty Brisket Tacos with Pink Pickled Onions

Name: Hearty Brisket Tacos with Pink Pickled Onions
Ingredients: 3 tablespoons canola or vegetable oil; One 3- to 4-pound piece brisket; Kosher salt and freshly ground black pepper; 3 tablespoons canola or vegetable oil, for searing; 1 large onion, sliced; 2 large carrots, large dice; 2 ribs celery, large dice; 4 cloves garlic, minced; 2 cups beef broth; 1/2 orange, juiced; 1/2 cup red wine; 2 bay leaves; One 26.46-ounce package crushed tomatoes, such as Pomi; Tortillas, warmed if desired, for serving; Pink Pickled Onions, recipe follows; Queso fresco, lime wedges, cilantro leaves, hot sauce, salsa, sour cream, shredded purple cabbage tossed with a splash of vinegar, lettuce and any other fixings you'd like, for serving; 1 cup warm water; 1/2 cup apple cider vinegar; 1 1/2 tablespoons sugar; Kosher salt; 1 large red onion, thinly sliced; Hot sauce, for seasoning