Heat the sauce gently on the stove – do not boil. You could also warm it up in the microwave – remove the plastic lid, pierce the film several times and heat on high (1000W) for 45 seconds. (All microwaves vary, so this is only a guide.) Please take care when removing the film afterwards, as hot steam may escape. Once the sauce is hot, leave to stand for 1 minute, then stir generously into your favourite cooked pasta.