In a large stockpot, whisk together water, monkfruit sweetener, lemon juice, cream of tartar, cinnamon, and nutmeg.
Add in chayote and ghee and bring to a boil over high heat.Boil for 10 minutes, stirring occasionally.Remove from heat.
If using the mixture as filling for a baking project, set it until needed.
Otherwise, transfer the mixture to an oven-safe dish and bake for 30 to 40 minutes at 350 degrees Fahrenheit.