Prepare the Peppers:Preheat your oven to 375°F (190°C). Slice the tops off the bell peppers and remove the seeds and membranes. Lightly oil a baking dish and arrange the peppers upright, ready to be stuffed.
Cook the Quinoa:In a medium saucepan, combine the rinsed quinoa with the vegetable broth or water. Bring to a boil, reduce heat, cover, and simmer for about 15 minutes, or until the quinoa is tender and the liquid is absorbed. Fluff with a fork and set aside.
Sauté the Veggies:While the quinoa cooks, heat olive oil in a large skillet over medium heat. Add the chopped onion and cook until soft and translucent, about 3-4 minutes. Add the minced garlic and cook for another minute until fragrant.
Add the Kale:Stir in the chopped kale and cook until it wilts down, about 5 minutes. Add the black beans, cumin, paprika, chili powder, and cayenne (if using), and season with salt and pepper to taste. Cook for another 2-3 minutes, allowing the flavors to meld together.
Mix the Quinoa:Remove the skillet from the heat and add the cooked quinoa to the kale and bean mixture. Stir until everything is evenly combined.
Stuff the Peppers:Spoon the quinoa mixture into the hollowed peppers, pressing down gently to fill them completely. If desired, top each pepper with shredded mozzarella or a vegan cheese alternative.
Bake the Peppers:Cover the baking dish with foil and bake for 30 minutes. Remove the foil and bake for an additional 10-15 minutes, or until the peppers are tender and the cheese is melted and bubbly.
Garnish and Serve:Once the peppers are cooked, remove them from the oven and sprinkle with freshly chopped parsley or cilantro. Serve immediately and enjoy!