After cutting in half, scoop out the seeds and the pulp.Tomatoes like to go though alittle ferment in their pulp to activate germination just like in the compost heap. And we all know how much tomatoes like to grow in compost heaps!
Place the seeds and pulp in a jar with a little water and place on the windowsill. Give it a little shake whenever you're passing and after a few days drain off the liquid and pour in fresh water. Leave this for a day and then strain and leave to dry on some muslin ( or something absorbant).
Once dry place in envelope or jar and label with type of tomato and the date. Store in airtight, dry place. We have a box made from coolroom panels which does the trick.
I will do the same for the Tommytoes and the Brandywines. These are the types of tomatoes that grow well here, as they are least susceptible to fruit fly, because of their tougher skins.