Preheat oven to 275℉.
Using a sharp knife, make shallow incisions on all sides of the chuck roast. Season generously with seasoning salt or salt and black pepper.
Heat oil in an oven safe skillet, dutch oven or large pot that can be fitted with a lid. Once the oil is hot, sear the roast 1-2 minutes on each side.
In a small bowl, whisk together beef broth, red wine vinegar, dried parsley, dried basil, garlic powder, and onion powder. Pour the mixture into the pot. Carefully lift the meat, and scrape up any solid bits from the bottom of the pan.
Cover and bake 1 hour per pound of meat, or until the roast easily pulls apart with 2 forks.
Transfer the roast from the pot to a plate. Place the pan on the stovetop on medium high heat. Return the mixture to a boil.
In a bowl, mix cornstarch with 2 tablespoons water. Stir it into the pot. Lower the heat, and simmer 3-4 minutes or until thickened to your desired gravy texture. Adjust seasoning as needed.
If desired, break apart the roast into smaller chunks or shred. Discard any excess fat. Transfer to a serving dish and pour 1/2 cup gravy over the top. Serve the remaining gravy on the side.