Peel, core, and dice the apple. Sauté with 1 tablespoon butter, 1 tablespoon sugar, and a pinch of cinnamon until just soft. Set aside to cool.

In a bowl, whisk together flour, baking powder, granulated sugar, cinnamon, and nutmeg.

In another bowl, beat the egg, milk, melted butter, and vanilla. Combine with the dry mixture and fold in the sautéed apples.

Preheat your waffle iron and lightly grease it. Pour batter into the waffle slots and cook until golden brown and crisp.

In a small bowl, mix powdered sugar with milk to create a glaze. Drizzle over warm waffle donuts.

Serve immediately for best texture and flavor.