Preheat your oven to 180°C.
In a bowl, thoroughly mix oats, grated carrots, mashed bananas, baking powder, soy milk, protein powder, egg, cinnamon, maple syrup, nuts and salt.
Prepare the baking form by greasing it with butter or lining it with baking paper. I've experimented with various baking forms, and I find that the rectangular silicone pan works best for me. It eliminates the need for butter or baking paper.
Transfer the mixture from the bowl to the prepared baking pan.
Bake for approximately 30-35 minutes.
Once baked, allow it to cool for 10-15 minutes.
Prepare the ricotta cream by mixing ricotta with icing sugar either by hand or with a mixer.
Spread the cream over the cake.
Sprinkle chopped nuts on top of the cake.
Refrigerate for at least 3 hours.
Enjoy a piece of healthy, guilt-free carrot cake!