Preheat oven to 375°F (190°C).
Slice the tops off bell peppers and remove seeds, setting them aside.
In a medium saucepan, bring vegetable broth to a boil, then add quinoa. Lower heat, cover, and simmer for 15 minutes.
Fluff quinoa with a fork and set aside.
In a bowl, mix quinoa with black beans, corn, tomatoes, cumin, paprika, chili powder, salt, and pepper.
Stuff the bell peppers with the quinoa mixture.
Place stuffed peppers in a baking dish, drizzle with olive oil, and cover with aluminum foil.
Bake for 25 minutes, then remove foil and bake for another 5 minutes until tops are lightly browned.
Garnish with fresh cilantro and a squeeze of lime before serving.