You can find them everywhere. They are little stands selling fruits and vegetables. Sometimes they only sell one item. Sometimes they sell a lot. Sometimes they have a little card telling you what an item costs. Sometimes they don’t. They sell things by the kilo, the 500 grams, and the each. If you do not know where one of these stands are in a city in Europe then you are very new to the neighborhood. Some of them are open everyday. Some till noon. Some of them are only open certain days of the week. Some of them are open all day and a lot of the evening. There’s no reason not to do some serious fruit and vegetable experimentation when you are in one spot in Europe for a time and have a kitchen.