Will Soaked cashews keep?

This will spoil quickly in my experience! You probably have less than a week. The good news is that soaked cashews are a great ingredient with versatile applications. If you want a no-fuss solution, you can make cashew milk (https://cookieandkate.com/2013/cashew-milk-recipe/). You can also blend it into a paste and add to creamy soups, like the others recommended. Cashew paste is the base of many good things in desserts, including vegan cheesecake, icing for baked goods (with some sweetener and flavor added, of course) and my personal favorite, ice cream. Minimalist Baker has several cashew-based ice cream recipes (such as: https://minimalistbaker.com/vegan-chai-ice-cream/). For more on cashew ice cream: http://www.bonappetit.com/test-kitchen/how-to/article/vegan-ice-cream-recipes

Hope this is a help!

Rinse them well. Cashews tend to get slimy, so use them asap. The idea to blitz them into a paste is a good one! Also, you can freeze them, either whole or in paste form, if you can't use them soon. ;o)

I think they will keep for another few days but I would use them up as soon as possible. One idea is to blitz them into a creamy paste and add them to any sauces or stews to provide body and a "creamy texture" without the fat.