In a saucepan, combine peeled and chopped apples, thawed rhubarb, and water.
Bring to a simmer over medium heat, stirring occasionally.
Let it cook for 15-20 minutes, or until the apples and rhubarb have softened and broken down.
Mash with a potato masher or use an immersion blender for a smoother consistency.
Start with ½ cup of sugar and taste the applesauce after simmering. If it’s still too tart, add more sugar or honey in small increments, adjusting to your preference.
If the applesauce is too thick, add a splash of apple juice or apple cider instead of water to maintain the flavor while adjusting consistency.
Continue simmering for another 5 minutes to allow the flavors to blend.
Let cool and serve immediately, or refrigerate for later use.