3-4 pounds beef chuck roast
1 tablespoon olive oil
1 onion, sliced
3 cloves garlic, minced
2 cups beef broth
1 tablespoon Worcestershire sauce
1 teaspoon salt
1/2 teaspoon black pepper
1 teaspoon dried thyme
1 teaspoon dried rosemary
3 carrots, cut into chunks
3 potatoes, cut into chunks