1. Combine first 3 ingredients in a large saucepan; bring to a simmer. Add 1 rind strip. Reduce heat, and simmer 25 minutes or until tender. Remove pears from pan with a slotted spoon; cover and chill.
2. Bring cooking liquid to a boil over high heat; cook until syrupy and reduced to 1 cup (about 20 minutes). Strain through a sieve into a bowl; cover and chill. Stir in liqueur. Arrange 2 pear halves in each of 6 shallow bowls; top each serving with about 3 tablespoons sauce and 1 rind strip, if desired.