Crush the oatmeal, almonds, and walnuts into small pieces.
In a bowl, mix protein powder, erythritol, and salt together.
Add almond milk and coconut oil to the mixture to make a dough.
Add the crushed nuts and oatmeal to the dough and mix evenly.
Line a pan with parchment paper and place the dough in streusel shapes.
Bake in a preheated oven at 170°C (338°F) for 15 minutes, then let it cool.