Preheat your oven to 375°F (190°C) and grease a baking dish.

Cook the rice according to package instructions.

In a large bowl, combine the cooked rice, chopped vegetables (tomatoes, onion, garlic, carrot, red pepper, zucchini), chives, and canned corn. Add oregano, vegetable spices, salt, and black pepper to taste.

Stir in the grated cheddar and mozzarella cheeses.

Transfer the mixture to the greased baking dish and spread it out evenly.

In a small bowl, mix the breadcrumbs with melted butter. Sprinkle the crumb topping over the casserole.

Bake for 20-25 minutes, or until the top is golden brown and crispy.

While the casserole bakes, prepare the sauce by combining Greek yogurt, mustard, sweet chili sauce, and chopped dill in a small bowl.