
Heat olive oil in a large high-sided skillet or braiser set over medium heat.
To the hot oil, add the onions and cook for 1 minute.
Stir in the ground beef and cook for 2 minutes.
Add the mushrooms and garlic.
Season mixture with salt and pepper and continue to cook until meat is browned and mushrooms have started to soften; about 5 to 7 minutes.
Stir in the cream of soup; cook for 3 minutes.
Reduce heat to medium low and stir in the sour cream; continue to stir until smooth and heated through, about 2 minutes.
Remove from heat and taste for salt and pepper; adjust to taste.
Stir in the cooked noodles.
Garnish with parsley.
Serve.