Assemble ingredients and equipment.
Peel, core, and slice apples and pears.
Peel and slice carrots; wash and halve radishes.
Add processed apples, pears, carrots, and radishes to soup or stock pot and begin cooking on stovetop on low heat.
Add berries to soup or stock pot; stir, and continue cooking on low heat.
After 3-4 hours, check apples, carrots, and radishes to see if they are soft enough for blending.
Use immersion blender to puree cooked fruits and vegetables.
Continue blending until texture is completely smooth.
Allow to cool, then use a ladle and spatula to transfer sauce into quart-sized mason jars for storage.
Label, then store in the refrigerator or freezer.