Preheat oven to 400°F and grease a baking sheet with nonstick spray.
In a medium bowl, whisk together the flour, baking powder, salt, and cinnamon.
In a large bowl, whisk the melted butter and sugar until combined. Then whisk in the egg, vanilla, and applesauce until smooth.
Add the dry ingredients to the wet ingredients and stir just until combined. Gently fold in the diced apples.
Scoop out 1 tbsp portions of batter and drop them a few inches apart onto the prepared baking sheet.
Bake for 10 minutes, then remove from oven and turn on broiler to high.
Make the glaze by whisking together the powdered sugar and apple cider/juice until thin and pourable.
Brush some of the glaze over the warm fritter bites, letting it drip down the sides. Broil for 2-4 minutes, rotating the pan frequently, until the glaze starts to caramelize and bubble up.
Remove from oven and brush the remaining glaze evenly over the tops of the fritters.
Let sit for 15 minutes to allow the glaze to set before serving.
