Step 1

Add raspberries, granulated sugar, water, zest and juice of lemon to a medium saucepan and bring to a boil over medium-low heat.

Step 2

Reduce heat and allow to simmer about 10 minutes or until thickened to coat the back of a spoon.

Step 3

Remove from heat and pour into jar of a blender.

Step 4

Blend on high speed for 10 seconds or until completely smooth.

Step 5

Pour into a bowl, cover with plastic wrap, and refrigerate until chilled, about 20 minutes or overnight.