Start by bringing a large pot of salted water to a rapid boil. Once boiling, add your pasta and cook until al dente, usually around 8-10 minutes. Drain, reserving about 1 cup of pasta water for later use.

In a large skillet, heat olive oil over medium heat. Add the diced onion and minced garlic, sautéing for about 5 minutes until the onions become translucent.

Add the ground beef to the skillet, breaking it up and cooking until browned, approximately 7-10 minutes. Season with salt, pepper, and Italian seasoning.

Reduce the heat to low and pour in the heavy cream. Stir gently, then gradually add half of the reserved pasta water. Stir in the Parmesan cheese until melted and combined.

Add the drained pasta to the skillet, tossing it with the creamy beef sauce until well-coated. Adjust thickness with more reserved pasta water if necessary.

Plate the creamy beef pasta hot, garnishing with additional Parmesan cheese or fresh parsley if desired.