How to Make It
In a food processor, combine the egg yolks with the vinegar, water, mustard, garlic and ½ cup of the trout and puree until smooth. With the machine on, gradually drizzle in the olive oil until emulsified. Scrape the puree into a medium bowl and fold in the remaining 2 cups of trout. Season the dip with salt and pepper.
In a medium bowl, whisk together all of the ingredients except the salt, pepper and potato chips. Season the vinaigrette with salt and pepper and spoon a little on the trout dip. Serve with potato chips, passing the remaining vinaigrette at the table.