Cut the beef into bite-sized pieces.
Finely chop the onion and garlic.
Heat olive oil in a pan and sauté the garlic and onion.
Add the beef and stir-fry over high heat.
When fully cooked, add tomato sauce and bring to a boil.
Pour in heavy cream and simmer while stirring.
Add the cooked pasta and toss well.
Season with salt and pepper to taste.
Plate and garnish with parsley.