This blueberry oatmeal cake is a hearty and healthy dessert that's perfect for breakfast or a midday snack. The cake is made with rolled oats and fresh blueberries, which give it a chewy and fruity flavor. To make this cake, you'll need flour, rolled oats, sugar, baking powder, salt, milk, eggs, vanilla extract, butter, and fresh blueberries. Mix the dry ingredients together, then add the wet ingredients and mix until smooth. Fold in the blueberries and pour the batter into a greased baking dish. Bake for 35-40 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool before serving.