In a medium saucepan, combine 1 cup blueberries, sugar, and water. Simmer for about 10 minutes. Many berries will begin to burst and syrup should thicken.
Add remaining cup of berries and allow them to heat through.
Refrigerate until ready to assemble crepes.
Recipe by Table for Fifty at https://tableforfifty.com/crepe-extravaganza-crepes-bar/