Preheat your oven to 200°C (400°F). Slice the tops off the peppers and remove the seeds and membranes, then place them cut-side up in a baking dish. Drizzle with olive oil, sprinkle with a pinch of salt, and roast for 15 minutes until they start to soften and their aroma becomes fragrant.
While the peppers roast, combine the cooked rice, quinoa, cooked ground turkey, smoked paprika, cumin, salt, and pepper in a large mixing bowl. Mix thoroughly until everything is evenly distributed, and the filling looks cohesive and fragrant.
Remove the peppers from the oven once they are slightly softened and fragrant. Carefully spoon the filling into each pepper, pressing gently to pack it in without overflowing. Leave a little space at the top for the cheese.
Sprinkle the shredded mozzarella and Parmesan cheese evenly over each stuffed pepper. This layer will melt and turn golden during baking, creating a bubbling crust.
Bake the stuffed peppers uncovered at 180°C (355°F) for 25-30 minutes, until the cheese is bubbly and golden, and the peppers are tender but still hold their shape.
Once done, remove the peppers from the oven and let them rest for 5 minutes. Garnish with chopped fresh herbs for a burst of freshness and color.