My specialty is Italian cuisine, and I'd introduce an authentic (onion-based) tomato sauce recipe. It goes well with pasta, pizza, or tacos.
Previously, I posted a garlic-based tomato sauce, but after making many different kinds of sauces, I felt that this sauce is also pretty good.
Simmering the canned tomatoes gets rid of the metallic smell and enhances the tartness and sweetness of the tomatoes.
Enjoy Japanese food around the world.