In 3-quart saucepan, heat 4 cups water to boiling. Add shrimp. Cover and return to boiling; reduce heat. Simmer uncovered 3 to 5 minutes or until shrimp are pink; drain. Cool.
In food processor, place shrimp. Cover; process, using quick on-and-off motions, until coarsely chopped. Add remaining ingredients except chives and baguette slices. Cover; process until smooth.
Spoon spread into serving bowl. Serve immediately, or cover and refrigerate up to 24 hours. Garnish with chives. Serve with baguette slices.