Italian Beef Sandwiches

Name: Italian Beef Sandwiches
Ingredients: 1/2 cup shredded carrots; 1/2 cup sliced pepperoncini; 1/4 cup sliced pickled jalapeños; 1/4 cup sliced roasted red peppers; 1 tablespoon olive oil; 1 tablespoon pepperoncini liquid; 1/2 teaspoon garlic powder; Freshly ground black pepper; 2 pounds sirloin steak, trimmed of excess fat and frozen for 10 to 15 minutes; Kosher salt and freshly ground black pepper; 2 tablespoons olive oil; 2 teaspoons Italian seasoning; 2 garlic cloves, minced; 1 1/2 cups low-sodium beef broth; 1 1/2 tablespoons balsamic vinegar; 4 hero rolls, split; 12 slices provolone