I don't think OP was referring to jarred sauces, rather home-made sauces made using canned (tinned) tomatoes, as opposed to fresh. The majority of Italian toma

I don't think OP was referring to jarred sauces, rather home-made sauces made using canned (tinned) tomatoes, as opposed to fresh. The majority of Italian tomato-based sauces call for canned tomatoes.