Creating Strawberry Frosting Puree can be accomplished easily by following these simple steps:

1. Prepare Your Strawberries: Wash and hull the fresh strawberries, then chop them into smaller pieces for quicker cooking.
2. Blend Strawberries: Place the chopped strawberries into a blender or food processor. Purée until smooth. If you prefer a chunkier texture, blend for a shorter duration.
3. Combine Ingredients: Add granulated sugar and lemon juice to the strawberry puree. Blend again until the sugar is fully dissolved and the mixture is smooth.
4. Heat Mixture: Transfer the strawberry puree to a saucepan over medium heat. Stir occasionally to prevent sticking.
5. Cook and Thicken (Optional): If using cornstarch, dissolve it in 1 tablespoon of cold water. Pour this mixture into the saucepan to thicken the puree. Continuously stir for 5-10 minutes until it reaches your desired consistency.
6. Taste and Adjust: Taste the puree and adjust the sweetness or tartness by adding more sugar or lemon juice if needed. Blend again briefly if you add ingredients.
7. Cool Down: Remove the saucepan from the heat and let the strawberry puree cool. You can refrigerate it to expedite the cooling process if desired.
8. Store for Later Use: Transfer cooled puree to an airtight container. Store in the refrigerator for up to a week or freeze for later use.

These steps will guide you in making this wonderful Strawberry Frosting Puree in no time!