Step 1

Preheat oven to 375°F. Lightly coat a 7-by-11-inch baking dish with cooking spray.

Step 2

Stir oats, milk, eggs, 1/4 cup brown sugar, melted butter, vanilla, lemon zest, lemon juice, cardamom, baking powder and salt together in a large bowl until combined. Fold in blueberries until evenly distributed. Pour the mixture into the prepared baking dish; sprinkle evenly with the remaining 2 tablespoons brown sugar.

Step 3

Bake until golden brown and set, about 40 minutes. Let cool for at least 10 minutes or up to 30 minutes. Serve warm or at room temperature.