Wash the sweet potatoes and prick them several times with a fork. Place them on a baking sheet lined with parchment paper.
Bake the sweet potatoes in the preheated oven for about 45-60 minutes, or until tender when pierced with a fork.
While the sweet potatoes are baking, prepare the Mediterranean filling. In a large bowl, combine the cooked quinoa, chickpeas, cherry tomatoes, cucumber, red onion, feta cheese, olive oil, lemon juice, oregano, salt, and pepper. Mix well to combine.
Once the sweet potatoes are done baking, remove them from the oven and let them cool slightly.
Cut each sweet potato in half lengthwise and gently scoop out some of the flesh to create space for the filling (reserve the flesh for another use if desired).
Spoon the Mediterranean filling generously into each sweet potato half.
Return the stuffed sweet potatoes to the oven for an additional 10 minutes to warm the filling.
Remove from the oven, garnish with fresh parsley, and serve warm.
Notes
Reserve the scooped sweet potato flesh for another use.