01 - Heat oven to 375°F.
02 - Drizzle 1 tablespoon olive oil inside a baking dish large enough to fit the peppers snugly.
03 - In a large skillet over medium heat, warm 1 tablespoon olive oil. Sauté onion for 3 to 4 minutes until translucent, then add garlic and cook 1 minute more.
04 - Add ground beef to the skillet; cook for 5 to 6 minutes until browned, breaking apart with a spoon. Drain excess fat if necessary.
05 - Stir in cherry tomatoes, cooked rice, oregano, cumin, smoked paprika, salt, and pepper. Cook for 3 minutes, then remove from heat.
06 - Fold in crumbled feta, chopped parsley, and optional mint. Adjust seasoning as needed.
07 - Fill each bell pepper generously with the beef mixture and place them upright in the prepared baking dish.
08 - Pour broth into the bottom of the baking dish.
09 - Cover with foil and bake for 30 minutes.
10 - Remove foil and bake an additional 10 minutes, until peppers are tender and tops lightly browned.
11 - Allow to rest for 5 minutes before serving. Garnish with additional parsley if desired.