Cut feta into 1-inch pieces. Place in a bowl; add milk. Cover and chill 8 hours. (Soaking reduces sodium content.) Drain.
Process feta cheese, cream cheese, and next 3 ingredients in a food processor until smooth, stopping to scrape down sides. Chill 30 minutes. Serve with baked tortilla chips or fresh vegetables.
Note: For testing purposes only, we used La Costeña Green Mexican Sauce.
