1. 1. Preheat the oven to 350°F (180°C).

2. 2. Peel and dice the sweet potatoes and boil them until tender. Drain and set aside.

3. 3. In a skillet, sauté the diced yellow onion until translucent.

4. 4. In a bowl, whisk together the eggs and almond milk. Season with salt and pepper.

5. 5. Add the cooked sweet potatoes to the skillet with the onions.

6. 6. Pour the egg mixture over the sweet potatoes and onions in the skillet.

7. 7. Cook on low heat until the edges start to set.

8. 8. Sprinkle fresh parmesan cheese on top of the frittata.

9. 9. Transfer the skillet to the preheated oven and bake for about 15-20 minutes or until the frittata is fully set and golden brown on top.

10. 10. Remove from the oven, let it cool slightly, then slice and serve.

11. 11. Enjoy your Sweet Potato and Parmesan Frittata!