Combine the mayo and cream cheese in a small food processor, pulse together to mix. Or mix very well by hand in a bowl.
Peel the skin off the trout and break up into smaller pieces. Add into the food processor, along with the rest of ingredients (saving a some chives for topping).
Mix until trout is chopped and mix is somewhat smooth. The texture is up to you. If you don’t have a food processor, chop the trout up small before adding to the bowl.
Taste to see if you need more acid (lemon) and top with chives. Serve alongside chips, crackers and/or bread. And add something pickled (radish, onions, cucumbers) for an extra punch!
Notes
Can be stored in an airtight container in the fridge for up to a week.
If you're subbing dairy free cream cheese, I personally love the Kite Hill Chive variety. SO good!