Below is what may appear to be a jar of odd looking capers. I re-used the caper jar and in fact they are nasturtium seeds pickled in vinegar.
My nasturtium plants produce hundreds, probably thousands, of these seeds which have a really unusual peppery flavour. This is how they grow on the plant.
They have been pickling for 3 weeks now and taste very similar to capers. I used plain white vinegar for this batch, but I’m going to experiment with some other vinegars for the next batches. Balsamic should be tasty.