Preheat oven to 400° F.
Place parchment paper on baking sheet and remove fish from packaging, laying it on parchment (skin side down). Season with salt and pepper.
In a food processor, combine walnuts and cilantro and process until fine.
Add all other ingredients and process until smooth. Add more olive oil if it is too thick to your liking.
Spread evenly over trout.
Place in oven and bake for about 20 minutes or until cooked through and edges are crisp.
Remove from oven. Fish easily comes right off the skin with a spatula.
Serve with desired sides!