Mix oats with milk and let stand for 5 minutes.

Add oil and egg whites to the oatmeal mixture.

In a separate bowl, blend together the flour, sugar, and baking powder.

Add the dry ingredients to the oatmeal mixture and stir until just combined.

Gently fold in the blueberries.

Line a muffin tin with cupcake liners.

Fill each liner with the muffin batter.

Bake in a preheated oven at 350°F (175°C) for approximately 12-15 minutes.

Bake until the muffins are lightly browned and a knife inserted into the center comes out clean.

Let the muffins cool slightly before serving.