Hey Judy,
Rome. I'm looking for restaurants that won't frown on my simple way of eating. Any suggestions would be appreciated.
"Rome is home" to many, many "family-style" eateries where you can order a pizza or a pasta dish, wine if inclined. You can order aqua minerale or frizzante (carbonated) or not at all.
If you don't want the bread they may put out on your table, just politely refuse it. (niente pane per favore)
Go off the beaten path so to speak (in Rome) and down little alley-way type streets -- around a lot of the major sites, you can discover little home-style, casual eateries that won't break your bank account or force your appetite to indulge.
If you order a pizza (Pizza Margherita was very popular), it will be "about" the size of a small / medium American style. You don't have to eat it all if it is too much, they won't frown.
Still, Italian pizzas are mostly thinner and lighter than most American ones. I love artichokes (carciofi), so I got a pizza with them on it. Delicious. I favored a restaurant near where I stayed (in the Termini area.) I was never disappointed.
You can order just a pasta dish -- say, Tortellini Bolognese, Amatriciana, Cacio e Pepe to name the most popular.
If you order Spaghetti, meatballs will not come with the dish. If you order a meat or poultry dish, veggies will come on a separate plate and usually a separate charge unless noted on menu.
Check out the appetizer section on menus -- there can be some choices with a mini version of a larger dinner.
If you are nearby Termini, check out the food court there. You can browse up and down the restaurant stalls and choose what you would like to eat. Lots of tables to sit. Expect much noise and crowding though.
If you are in the Vatican / St. Peter's area, walk around (5 minutes or so) to the Borgo area. You can find some neighborhood eateries there.
Campo de' Fiori has a lovely, little restaurant down one of the alley streets off the Piazza. I can look up the name and address if you want.
Bakeries also sell "pizza to go" so to speak. Watch this video from The Roman Guy (tour company) to get an idea https://www.youtube.com/watch?v=PUKa82QCFH0 They feature Trastevere, a neighborhood in Rome.
buon appetito!