Wash and trim the bottoms off the strawberries, leaving 2-inches at their tops.
Chop the strawberries into small pieces with a knife or food processor.
Add the chopped strawberries along with one cup of water to a medium saucepan on medium heat and bring to a boil. Reduce the heat and let simmer for about 10 minutes until all the liquid evaporates.
Remove from the heat and allow to cool completely, then transfer to a bowl using a slotted spoon.
Place the cooked strawberries in a sieve lined with muslin cloth or cheesecloth, and squeeze gently to remove any additional juices left behind in the pan.
Mix together the strained strawberries and sugar in a large bowl, and serve warm or chilled.