Experienced gardeners only! If I let my tomatoes and green peppers go to seed,,,?

For tomatoes: allow the fruit to ripen completely on the vine, then sc all the seeds from three or four tomatoes into a plastic tub and allow it to sit in a dark cool place for a couple weeks un til a mold forms over the whole top. Wash the seeds completly and allow to dry. These seeds will produce hearty plants next year. Bell peppers must be allowed to mature on the plant. Soak seeds overnight and pat dry, then air dry for two or three days. Store all seeds in paper bags in a cool dark place until ready to use. Seeds will be good for up to three years.