Preheat oven to 400°F (200°C).
Cut the acorn squash in half and remove seeds.
Brush the insides with olive oil, season with salt and pepper.
Place squash halves cut side down on a baking sheet and roast for 30 minutes.
In a pot, bring vegetable broth to a boil. Add quinoa, reduce heat, cover, and simmer for 15 minutes.
In a pan, heat olive oil over medium heat. Sauté onion and bell pepper until soft.
Add black beans, corn, cumin, and paprika. Cook for another 5 minutes.
Mix cooked quinoa with the vegetable mixture.
Fill roasted squash halves with the quinoa mixture.
Garnish with fresh parsley and serve.