Preheat your oven to 300°F and place a large baking pan filled with 1 inch of water on the middle rack to create a water bath.
Lightly grease a silicone muffin mold with the coconut oil to ensure the bites release easily.
In a high-speed blender, combine the egg whites, Greek yogurt, rolled oats, honey, almond butter, vanilla extract, cinnamon, and sea salt.
Blend on high for 45-60 seconds until the mixture is completely smooth and slightly frothy.
Divide the batter evenly among the muffin molds, filling each cavity about three-quarters of the way to the top.
Drop the fresh mixed berries into each mold, pressing them down gently so they are partially submerged in the batter.
Carefully place the muffin mold into the preheated water bath and steam in the oven for 25 to 30 minutes until the centers are set.
Remove from the oven and let the bites cool in the mold for at least 5 minutes before gently popping them out to serve.