There is no point in getting fish in that area. In the lower parts of the trek, we can get fruits to buy which they bring from Kathmandu to sell to trekkers. Most of the trekking company provides fresh fruits from Kathmandu which the guide will serve during dinner time and some time in breakfast and lunchtime. Fruits such as pineapple, and apple stay for long and are safe too. Almost all guest houses will have eggs to serve trekkers but that could be stored long because they bring more in the offseason so that they can sell in season. Some of the teahouses have their own garden for fresh vegetables so that time you will have the opportunity to get fresh vegetables. While selecting a guesthouse look if they have a garden full of vegetables.