1 cup water
2 cups sugar
5 cups or 2 pounds frozen unsweetened strawberries
2 tablespoons lemon juice
2 tablespoons fruit liqueur (optional)
Bring water and sugar to a boil and continue boiling until all the sugar is dissolved. Set aside to cool.
Meanwhile, thaw the strawberries and then place the thawed strawberries in a food processor and process until the strawberries are pureed. Add the lemon juice and optional liqueur and refrigerate until the mixture is thoroughly chilled. Once the simple syrup and pureed strawberries are completely chilled, combine the simple syrup with the pureed strawberries. Pour the mixture into a shallow covered container and place in the freezer.
After 3-4 hours, when the sorbet is completely frozen remove from freezer and let stand at room temperature until partially thawed. Transfer the partially thawed sorbet to the food processor, and process to break up the large ice crystals that have formed on the sorbet.