Preheat the oven.

In a large mixing bowl, combine the frozen waffle quarters and fresh blueberries.

In another bowl, whisk together the milk, eggs, granulated sugar, lemon zest, lemon juice, vanilla extract, and baking powder.

Pour the milk mixture over the waffle and blueberry mixture, stirring gently.

Transfer the mixture to a prepared baking dish.

Bake in the oven until set and golden brown.