01 - Preheat oven to 375°F. Place bell peppers upright in baking dish, drizzle with olive oil, and roast for 10 minutes to soften. Remove and set aside.
02 - Place diced potatoes in pot, cover with salted water, and bring to boil. Cook until fork-tender, approximately 10-12 minutes. Drain and set aside.
03 - Heat 2 tablespoons olive oil in large skillet over medium heat. Sauté onion and garlic for 2-3 minutes until fragrant.
04 - Add zucchini and corn to skillet. Cook for 3 minutes, stirring occasionally.
05 - Stir in cooked potatoes, black beans, Cajun seasoning, smoked paprika, thyme, salt, and pepper. Cook for 2 minutes, then remove from heat.
06 - Lightly mash potato mixture, leaving some chunks. Mix in milk, half the cheese, and half the parsley until combined.
07 - Spoon filling mixture evenly into bell peppers. Sprinkle tops with remaining cheese and breadcrumbs.
08 - Bake for 25-30 minutes until tops are golden brown and peppers are tender.
09 - Remove from oven, garnish with remaining parsley, and serve hot.