Strawberries
In warmer states harvest occurs from April – June and slightly later in colder regions. Dehydration takes about 7-15 hours, less so if sliced. Easy to grow. Perfect for containers. If grown up off of the ground there is less danger from slugs and snails. Very little maintenance, prolific both in terms of producing fruit and runners. Runners become new plants.
All of these fruits are easy to grow, require little labor and produce crops throughout the summer, and fall. Some even produce late spring crops as well. One trick to extending the harvest is to pay close attention to harvest dates and then plant a variety fruits that ripen at different times. If you could only grow three types of fruit, which would you grow?