You rang sir?
Oh yes, there is a way
Always start with the nicest fruit - not the one that's "spare"
1) Cut the tomato in half
2) With a teaspoon scoop out all the seeds and gloop into a glass
3) Cover seeds and gloop with 2" of tap water
4) Cover glass with kitchen roll and secure with a laggy band.
5) Put somewhere warm (windowsill on a radiator etc.)
6) Each day remove "lid" and stir well
7) After about 3 days the goo will have fermented and floated off forming a scum
8) Pour of scum
9) Drain seeds though a sieve
10) Spread seeds to dry on a plate covered with kitchen roll
11) Put plate for drying somewhere warm, move seeds about every day for about a week (two is better)
12) When seeds are totally dry, store in a paper envelope
That's it really