tomato sauce BrE
ketchup AmE
catsup AmE

Serve at once, with the tomato sauce on the side.

The only kind he had was with tomato sauce but the cat didn't seem to care.

Add the tomato sauce or juice and enough water to cover.

To make a simple tomato sauce, heat the oil in a small skillet.

Add them to the tomato sauce, cover and simmer 3 to 5 minutes.

I have made fresh tomato sauces in five minutes or so.

The only thing I cannot forgive is the tomato sauce.

I don't see why anyone should make a fuss about a bit of tomato sauce.

Do you know how hard it is to get tomato sauce out of silk?

Only a bit of fat is used to flavor the tomato sauce.