How do you stop tomato sauce from splattering? In order to reduce tomato sauce to make a nice thick tasty topping for pasta, you often need to let it simmer with the lid off for a very long time. This always seems to result in tomato splatters all over my kitchen.

How can one prevent the splattering without preventing the evaporation of liquids that allows the sauce to thicken? Thanks!
You can lower the temperature to simmer and reduce your sauce, it will take a longer time, but will do the job.

or

Have a look at splatter screens at your local stores (or online)

or

Or just put the pot lid on with a wooden spoon to keep it slightly ajar.