1. Tear bread into pieces, and place in a small bowl. Drizzle milk over bread, tossing to moisten.
2. Combine soaked bread, tarama, and next 5 ingredients in a food processor; process until smooth. With processor running, slowly add olive oil through food chute, processing until mixture is mousse-like and fluffy. If too thick, add 2 tablespoons water to thin slightly. Spoon into a bowl; cover and chill at least 1 hour. Top with additional tarama. Serve with pita chips.