01 - Preheat oven to 375°F. Stand bell peppers upright in a baking dish, drizzle with 1 tablespoon olive oil, and roast for 10 minutes until slightly softened. Remove from oven.
02 - Place diced potatoes in a large pot, cover with salted water, and bring to a boil over high heat. Reduce to medium and cook for 10 to 12 minutes until fork-tender. Drain well and set aside.
03 - Heat remaining 1 tablespoon olive oil in a large skillet over medium heat. Add onion and garlic, sauté for 2 to 3 minutes until fragrant and translucent.
04 - Stir in zucchini and corn, cook for 3 minutes until vegetables begin to soften.
05 - Add cooked potatoes, black beans, Cajun seasoning, smoked paprika, thyme, salt, and pepper. Toss to combine and cook for 2 minutes. Remove from heat.
06 - Lightly mash potato mixture, leaving some chunks for texture. Mix in milk, half the cheese, and half the parsley until well combined.
07 - Spoon filling mixture evenly into pre-roasted bell peppers. Top with remaining cheese and breadcrumbs, pressing gently to adhere.
08 - Return baking dish to oven and bake for 25 to 30 minutes until tops are golden brown and peppers are completely tender when pierced with a knife.
09 - Remove from oven and sprinkle with remaining parsley. Serve hot while cheese is still melted.