Warm waffle iron.
In a medium mixing bowl combine eggs, milk and oil. Add flour, baking powder, sea salt and potato starch. Whisk together.
Pour ½ cup batter in waffle iron and bake until golden brown.
Continue until all batter is gone.
In a small saucepan over medium heat, bring to a simmer. Using a fork or a potato masher, mash blueberries.
Continue to cook over a low simmer stirring frequently until it begins to thicken, about 7-10 minutes.
Remove from heat and serve over waffles.
Store leftovers in an airtight container in the fridge. Freezer friendly.