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