Add strawberries and cook over medium-high heat for 5 minutes. Set aside.
Dissolve cornstarch in 1/2 cup cold water and mix well.
Put strawberries back on burner; add cornstarch and stir, bringing mixture to a boil. Boil for 1 minute. Cool slightly.
Blend 1 1/3 cups of mixture in blender.
Then combine both and serve.
Can serve warm or cold. Use on waffles, pancakes, ice cream, etc. Refrigerate leftovers.