1. Slice the pears into thin wedges and core. In a shallow, wide pot, place pears, sugar, and water.
2. Cover and cook over low heat for about 15 minutes, or just until pears are beginning to soften.
3. Remove from heat. Add liqueur and mix.
4. Transfer to a storage container and refrigerate for 3 hours or up to 3 days.
5. Serve with chocolate sauce.