For the Waffles
In a large mixing bowl, stir together the flour, protein powder, corn starch, baking powder, and salt. Add the eggs, milk, melted butter, and vanilla. Stir to combine then add in the blueberries. Heat a waffle iron and coat with cooking spray. Pour batter onto the waffle iron and cook until the waffles until golden brown. Serve with lemon sauce, if desired.
For the Sauce
Add the sugar and cornstarch to a saucepan and whisk to combine. Add the corn syrup, milk, lemon juice and lemon zest. Cook on medium heat stirring occasionally until it’s reached a boil. When thickened, remove from the heat and stir in the butter until melted. Makes 3 cups.
Note: Can add yellow food coloring at the end for a brighter yellow color.