Take 1 cup of the chopped strawberries and add them to a small bowl and mash, set aside.
In a medium saucepan, stir together the sugar and cornstarch. Then stir in water and the mashed strawberries.
Bring strawberry mixture to a boil, stirring constantly. If you desire a darker red color you can stir in red food coloring at this time.
Cook and stir the strawberry mixture for 3 minutes or until it has thickened.
Remove from heat, stir in reserved chopped strawberries. Transfer mixture to a bowl and let cool for 10-15 minutes.
Add strawberry sauce to a jar or container with lid.
Serve immediately or store in refrigerator for up to 2 weeks in airtight sealed container.