Preheat oven to 190 Cº (400 Fº).
In a large mixing bowl add 1 egg, almond butter, coconut sugar (or your preferred granular sweetener)vanilla extract, lemon juice and salt. Using a fork or whisk, stir the wet mixture for a couple of minutes until all is well combined.
Add to the wet mixture rolled oats (or a mix of rolled oats and protein powder, see notes*) and baking powder. Using a spatula stir, all ingredients together. Depending on the nut butter consistency, if it is too thick, the dough may require about 1 tablespoon (15 ml) of milk.
Carefully fold in the fresh blueberries, making sure not to smash them.
Let the healthy blueberry oatmeal cookies batter rest for at least 15 minutes in the fridge
Scoop some dough out and shape 10 cookies. Transfer the blueberry cookies to a parchment paper covered baking sheet, spacing the cookies apart.
Bake these flourless oatmeal cookies with blueberries in hot oven for 10 to 15 minutes – mine took 13 minutes – and let cool over a baking rack before serving.