Use a spoon to guide the purèe into freezer trey compartments. Leave 1-2 centimeters on top because it will expand as it freezes. Freeze fully.
Once frozen fully, remove and place frozen food cubes into plastic freezer bag. I recommend labeling the freezer bag with the food, i.e. “peas” or “carrots.” Clean the freezer trey and repeat this process with another food item until you have a few options.