Gluten-Free Blueberry Lemon Breakfast Casserole

loaf Schär gluten-free bread (toasted)

fresh or frozen blueberries

large eggs (,whisked)

milk (dairy-free use almond, cashew or coconut milk)

granulated sugar

lemon juice

dried lemon peel

pure vanilla extract

all-purpose gluten-free flour (I like Pillsbury gluten-free)

light brown sugar (,packed)

salt

unsalted butter (melted)

powdered sugar

pure vanilla extract

lemon juice