Step 1: Prepare the Ingredients

1. Dice the beef into bite-sized pieces if not already pre-cut. Season with salt, pepper, oregano, basil, and smoked paprika.

Step 2: Add to the Slow Cooker

1. Place the seasoned beef, diced onion, garlic, and beef broth into the slow cooker. Stir to combine.
2. Cover and cook on low for 6–8 hours, or until the beef is tender and flavorful.

Step 3: Make the Cream Sauce

1. About 30 minutes before serving, stir in the heavy cream or half-and-half and Parmesan cheese. Let it cook on low for another 30 minutes to allow the flavors to meld and the sauce to thicken slightly.

Step 4: Cook the Pasta

1. While the cream sauce is thickening, bring a large pot of salted water to a boil. Cook the pasta according to the package instructions until al dente. Drain and set aside.

Step 5: Combine the Pasta and Sauce

1. Stir the cooked pasta into the slow cooker, mixing until the pasta is evenly coated with the creamy garlic beef sauce. Add the tablespoon of butter for extra richness, if desired.

Step 6: Serve

1. Serve the pasta immediately, garnished with fresh parsley or basil and additional Parmesan cheese. Pair with garlic bread or a side salad for a complete meal.