Preheat your oven to 375°F (190°C).
In a large mixing bowl, combine the sliced zucchini, corn, diced tomatoes, onion, jalapeños, garlic powder, onion powder, smoked paprika, salt, and black pepper. Drizzle with olive oil and toss until well combined.
Transfer the mixture to a greased 9x13-inch baking dish, spreading it evenly.
Sprinkle the shredded cheddar cheese on top of the vegetable mixture. If using breadcrumbs, sprinkle them over the cheese for added crunch.
Bake in the preheated oven for 25-30 minutes, or until the zucchini is tender and the cheese is bubbly and golden.
Remove from the oven and let it cool for a few minutes. Garnish with fresh cilantro or parsley if desired before serving.