Preheat your oven to 400°F (200°C).
Cut the acorn squashes in half and scoop out the seeds.
Brush the insides with olive oil and sprinkle with salt and pepper.
Place the squash halves cut-side down on a baking sheet.
Roast for 30 minutes until tender.
In a bowl, mix cooked quinoa, cherry tomatoes, parsley, and balsamic vinegar.
Season with garlic powder, salt, and pepper to taste.
Once the squash is done, flip them over and fill each half with the quinoa mixture.
Top with crumbled feta cheese if desired and return to the oven for an additional 10 minutes.
Serve warm and enjoy your delicious acorn squash dish.