Preheat your oven to 350°F (175°C) and lightly grease a standard muffin tin or line with silicone liners.
In a medium mixing bowl, whisk together the rolled oats, vanilla protein powder, baking powder, ground cinnamon, and sea salt until well combined.
In a separate bowl, combine the non-fat Greek yogurt, egg, almond butter, unsweetened almond milk, and vanilla extract, whisking until the mixture is smooth.
Pour the wet ingredients into the dry ingredients and stir with a spatula until just incorporated.
Gently fold in the fresh blueberries, being careful not to over-mix so the batter doesn't turn purple.
Divide the batter evenly among the prepared muffin cups, filling each about three-quarters full.
Bake for 20 to 25 minutes, or until the tops are golden brown and a toothpick inserted into the center comes out clean.
Allow the oatmeal cups to cool in the tin for 5 minutes before transferring them to a wire rack to cool completely.