Possible targets for tariff rises are foodstuffs like Danish hams, French cheeses and Italian canned tomatoes.

No store cupboard worth its salt is ever without Italian tomatoes - top of the list for canned standbys.

American officials have listed an equivalent quantity of products for retaliation, including Danish hams, French cheeses and Italian canned tomatoes.

Roma tomatoes are also known as Italian tomatoes or Italian plum tomatoes.

Mozzarella must be fresh, sauce must be prepared from Italian tomatoes and the dough must be handmade.

Not to be mistaken for the popular Mexican alcoholic drink Margarita or the Italian tomato and cheese based pizza Margherita.

Imported canned Italian tomatoes, preferably San Marzanos, are the proper base for the sauce, he said.

Otherwise, canned crushed Italian tomatoes are the best bet - they are always ripe and full flavored.

Cookbooks in a dozen languages specify canned Italian tomatoes, meaning tomatoes from this region.

The basic quick tomato sauce is made by sauteeing garlic with Italian crushed tomatoes, oregano, rosemary and pepper flakes.