Process thenfreeze-dried strawberries in a small food processor or a clean spice grinder until a powdered consistency is reached.
Pass the powdered strawberries through a sieve to strain out the seeds.
In a medium-sized bowl, whisk together the powdered strawberries and sugar.
Add water, one teaspoon at a time, until the mixture is the consistency of wet sand. Your climate will effect how much water is needed.
Press the mixture firmly into silicone heart molds* or any shape silicone molds of your choice. Brush off any excess sugar.
Let dry, uncovered, at least 24 hours. Remove sugar hearts from molds and store in a covered container.