1. In a large mixing bowl, sprinkle the gelatin powder over the cold water. Let it sit for 5 minutes to bloom.

2. In a saucepan, heat the boiling water and stir in the granulated sugar using a wire whisk until fully dissolved.

3. Gradually pour the hot sugar water into the bloomed gelatin mixture, whisking continuously with the wire whisk to combine.

4. Add the fruit juice and optional food coloring, then mix thoroughly with a silicone spatula until smooth.

5. Pour the mixture into a measuring cup for easy handling, then transfer into individual molds or a pie dish.

6. Refrigerate for at least 4 hours, or until completely set.

7. Once set, use a rubber spatula to loosen the edges and unmold if desired.

8. Serve chilled and enjoy.