Wash the sweet potatoes thoroughly and poke several holes in each with a fork. Place them on a baking sheet.
Bake the sweet potatoes in the preheated oven for 45-60 minutes, or until they are tender when pierced with a fork.
While the sweet potatoes are baking, prepare the stuffing. In a large bowl, combine cooked quinoa, chickpeas, cherry tomatoes, feta cheese, olives, and red onion.
Drizzle the mixture with olive oil and lemon juice; add garlic powder and season with salt and pepper. Stir until well combined.
Once the sweet potatoes are cooked, remove them from the oven and allow them to cool slightly. Cut each sweet potato in half lengthwise.
Use a fork to gently fluff the sweet potato flesh while keeping the skin intact.
Spoon the Mediterranean filling generously into each sweet potato half.
Place the stuffed sweet potatoes back in the oven for another 10 minutes to heat everything through.
Remove from the oven, sprinkle with fresh parsley, and serve warm.
Notes
Feel free to add more vegetables or spices to the filling as desired.