Preheat your oven to 375°F (190°C).
Slice the tops off the bell peppers, then carefully remove the seeds and internal membranes to create a hollow cavity.
In a large skillet over medium heat, add the olive oil and brown the ground beef until no pink remains.
Stir the cooked brown rice, tomato puree, sea salt, black pepper, garlic powder, and turmeric into the beef mixture.
Allow the filling to simmer for 3-5 minutes, allowing the moisture to absorb and the turmeric to release its vibrant color.
Divide the beef and rice mixture evenly, packing it tightly into the two hollowed bell peppers.
Place the peppers upright in a small baking dish and sprinkle the tops with the grated Parmesan cheese.
Bake for 25 to 30 minutes until the peppers are fork-tender and the cheese has formed a light golden crust.
Garnish with freshly chopped parsley and serve immediately.