Rinse the strawberries thoroughly under cold water.
Hull the strawberries and slice them into quarters.
In a medium saucepan, combine the sliced strawberries and sugar.
Add the lemon juice and a pinch of salt to the saucepan.
Cook over medium heat, stirring occasionally, until the strawberries release their juices.
Allow the mixture to simmer for about 10-15 minutes.
If desired, stir in the vanilla extract for added flavor.
Mash the strawberries with a fork or potato masher for a smoother texture.
Remove from heat and let the sauce cool slightly.
Transfer the sauce to a jar or container and refrigerate until ready to use.