Preheat your oven to 375°F (190°C).
Slice the tops off the bell peppers and carefully remove the seeds and membranes from the inside.
In a large skillet over medium heat, add the extra virgin olive oil and sauté the diced yellow onion and minced garlic until translucent and fragrant.
Add the ground turkey to the skillet, breaking it up with a spoon, and cook until browned and fully cooked through.
Stir in the cooked brown rice, tomato puree, sea salt, black pepper, dried oregano, and smoked paprika until the mixture is well combined.
Stand the bell peppers upright in a baking dish. If they are wobbly, slice a tiny bit off the bottom to level them without creating a hole.
Spoon the turkey and rice mixture into each pepper, packing it down gently.
Pour a small amount of water (about 1/4 cup) into the bottom of the baking dish to create steam, then cover the dish tightly with foil.
Bake for 35-40 minutes, or until the peppers are tender when pierced with a fork.
Remove from the oven and let rest for 5 minutes before serving.