I had dinner with my family today. We often go to an Italian restaurant, and we love Italian food. I enjoy eating delicious food with my precious family.
You can say "an Italian restaurant" or "Italian restaurants". It does not matter if you go to the same restaurant every time or not. If you want to specify that you do always go to the same restaurant, you could say its name or you could write:
"There is an Italian restaurant we often go to (or 'where we often dine')." That means you go to the same place every time.