Season the chunks of chuck roast generously with salt and black pepper.
2 pounds beef chuck roast*, ½ teaspoon kosher salt, ½ teaspoon freshly ground black pepper
Set your pressure cooker to sauté mode. Add vegetable oil, and when hot, sear the beef chunks on all sides until browned. Remove the beef and set it aside.
2 tablespoons vegetable oil
In the same pressure cooker, add sliced onions and minced garlic. Sauté until the onions are soft and translucent.
1 large onion, 2 cloves garlic
Add the seared beef back into the pressure cooker. Pour in beef broth, Worcestershire sauce, thyme, and rosemary. Stir well. Secure the lid on the pressure cooker and set it to high pressure. Cook for 90 minutes.
1 cup low-sodium beef broth, 1 tablespoon Worcestershire sauce, 1 teaspoon dried thyme, 1 teaspoon dried rosemary
Once the cooking time is complete, allow natural pressure release for about 15 minutes. Then, manually release any remaining pressure.
Remove the beef and shred using two forks. Set aside.
In a small bowl, mix flour with water to create a smooth paste.
¼ cup all-purpose flour, ¼ cup water
Add ½ cup of the cooking liquid into the flour-water mixture and stir until smooth.
Gradually whisk this paste into the cooking liquid in the pressure cooker to create a thickened gravy. Switch the pressure cooker back to sauté mode and stir until the gravy thickens.
Add the shredded beef and stir to ensure it’s coated with the rich gravy. Season with salt and pepper to taste.
Serve the shredded beef on the toasted bread or rolls. Top with a slice of cheese if preferred.
4 slices French bread, 4 slices Swiss cheese**