Restaurants almost all use inferior fats, such as seed oils. It's rare to find one using real butter, decent olive oil, etc. They also generally buy their sauce

Restaurants almost all use inferior fats, such as seed oils. It's rare to find one using real butter, decent olive oil, etc. They also generally buy their sauces and dressing from large industrial processors. If you are trying to avoid PUFAs, you need to cook your own meals.