Wash the apples. Cut in half and remove seeds and stems.
Cut each half into 4-6 pieces
Remove pits from prunes (or - timesaver: get pitted prunes!)
Put apples, prunes, and water into a large pot.
Cover and turn the burner on high.
Cook for 8 minutes, stirring occasionally.
Pour everything into a blender, puree until smooth.
Pour into ice cube trays and allow it to cool. Cover/wrap, and freeze.
Thaw in the fridge the night before use, or thaw by putting the ice cube in a bowl over a bowl of hot water on the counter to defrost.