On one site I have a plugin that imports data from Danea, and so far so good. In the import, for each product there are a number of custom fields, including, for example meta_easyfatt_libero_1 which contains the value GENRE|JUNIOR
Now I would like to have a link that allows me to view ALL products having, in this case, the value GENRE|JUNIOR present in the customised field meta_easyfatt_libero_1
Can you tell me how to proceed, or suggest me some plugins?