Combine all the dry ingredients in one bowl: cassava flour, rice flour, psyllium husk, cardamom, ginger, cinnamon (if using), baking powder, salt, and monk fruit.
In a separate bowl, mix the egg, maple syrup, and milk until well-combined, then set aside. Wash and cut up your apples into small chunks, the same size as each other but whatever size you'd prefer.
Add the flour mixture and water to the egg mixture, and then quickly stir until well combined, as the psyllium husk will absorb a lot of liquid immediately. Drop in the apple chunks and mix until just-combined, then heat your oil.
Add ⅓ cup of oil to a pan over medium heat, then after about 2 minutes you can drop in your first two fritters. You'll know the oil is hot when you put a wooden spatula into the oil and it lightly sizzles; if it starts smoking, then take it off the heat immediately.
Each side will need 2-3 minutes to cook, and you should be able to easily flip the fritters with tongs once they're cooked on either side. If you're running out of oil near the end and don't want to waste more, just tip the pan to deepen the oil that's in contact with the batter. As they finish cooking, place each fritter on a metal cooling rack or a paper towel on the counter; once they're done you can make your glaze.
To make the glaze, simply put the sugar, coconut milk, and a dash of salt in a pan over medium-low heat and stir well. Let the mixture heat up until simmering (it will be quite dark), and let it bubble for one minute.
Turn off the heat and put the pan on a cool burner, then stir in the vanilla. Your glaze is now ready and can be drizzled on your fritters!