Brisket Sliders with Ranch

Name: Brisket Sliders with Ranch
Ingredients: 1 teaspoon onion powder; 1/2 teaspoon paprika; 1/8 teaspoon ground allspice; Kosher salt and freshly cracked black pepper; One 3-pound brisket; 2 tablespoons olive oil; 2 bay leaves; 2 onions, cut into large chunks; 2 carrots, cut into large chunks; One 15-ounce can diced tomatoes; 2 cups cola; 12 mini pretzel slider buns, for serving; Homemade Ranch, recipe follows; Pickled jalapenos, for serving; 1 cup Greek yogurt; 1/4 cup mayonnaise; 1 tablespoon juice from pickled jalapenos, optional; 2 tablespoons chopped fresh parsley; 2 tablespoons chopped fresh dill; 2 tablespoons chopped fresh chives