Classic stuffed bell peppers with a zesty twist

Ingredients

• 4 large bell peppers (various colors)
• 1 tablespoon olive oil, plus more for drizzling
• Salt and freshly ground black pepper, to taste
• 1 pound ground beef (or ground turkey, chicken, or a plant-based alternative)
• 1 medium yellow onion, finely chopped
• 2 cloves garlic, minced
• 1 cup cooked rice (long-grain or brown rice)
• 1 (14.5 ounce) can diced tomatoes, undrained
• 1/2 cup tomato sauce
• 1/2 cup chopped fresh parsley
• 1 teaspoon dried oregano
• 1/2 teaspoon smoked paprika
• 1/4 teaspoon red pepper flakes (optional)
• 1/2 cup shredded cheddar cheese (or mozzarella, or a vegan alternative)