1. Preheat the oven to 180°C (350°F). Wash the sweet potatoes and prick them all over with a fork. Place them on a baking sheet lined with parchment paper.
2. Bake for 50 minutes. The potatoes should become tender and a knife should easily go through the flesh.
3. Cook the quinoa in salted boiling water.
4. Cut the broccoli into florets, wash them, and blanch them in a pot of salted boiling water.
5. Cut the sweet potatoes in half.
6. Using a spoon, remove about 2/3 of the flesh, being careful not to pierce the skin. Set aside the flesh.
7. Season the bottom of the sweet potatoes with salt, fill them with quinoa, and add a few broccoli florets.
8. Sprinkle with crumbled feta cheese.
9. Blend the sweet potato flesh with oil, garlic, and cream. Add nutmeg.
10. Serve the stuffed sweet potatoes hot with the sauce/puree on the side.