Start by bringing a pot of salted water to a boil for your pasta. Cook the pasta until it reaches that perfect al dente texture, following the instructions on the package.

In a large skillet (or a small pot/Dutch oven), heat up some olive oil and add the chopped onion. Sauté them over medium-high heat for approximately 4-5 minutes until they turn translucent.

Introduce the lean ground beef and minced garlic into the skillet, continuing to cook for roughly 8 minutes until the beef has browned. Use your spoon to break up the meat as it cooks. If there's an excessive amount of fat, don't forget to remove it.

Incorporate the canned diced tomatoes, tomato paste, Dijon mustard, and Italian seasoning into the mixture. Allow it to simmer for about 4-5 minutes until the sauce undergoes a reduction.

Now, add the heavy/whipping cream to the skillet, letting it cook for another 3-5 minutes until it warms through and reduces slightly, contributing to the creaminess of the sauce.

Season your creation with salt and pepper generously according to your preferences. Finally, toss the drained pasta into the savory beef sauce, ensuring every strand is coated in the delectable mixture.

For an optional flavor boost, serve your Easy Creamy Ground Beef Pasta with a sprinkle of freshly grated Parmesan cheese. It's the perfect finishing touch to elevate this already mouthwatering dish.