Place the beef stew meat along with the finely chopped onion and minced garlic into the base of the slow cooker.
In a separate bowl, whisk together the cream of mushroom soup, beef broth, heavy cream, dried basil, and dried oregano until the mixture is smooth and cohesive. Pour this prepared sauce over the contents in the slow cooker, ensuring everything is well covered.
Secure the lid and set the cooker to low, allowing it to simmer for 6 to 8 hours, or until the beef becomes tender and succulent.
Roughly 30 minutes before serving, cook the pasta in accordance with the package instructions until al dente. Drain the pasta thoroughly and set aside.
Add the cooked pasta into the slow cooker, followed by the grated Parmesan cheese. Season the mixture with salt and pepper according to preference, then stir well to blend all ingredients uniformly.
Continue to cook for an additional 10 to 15 minutes to allow the flavors to meld together completely.
Serve warm, garnishing with fresh chopped parsley if desired.