Preheat oven to 375°F (190°C).
In bowl, combine the ingredients for Cajun seasoning mix and stir to combined.
See also Fried pork chops
In baking dish, mix potatoes, corn, 2 garlic cloves, 1 tsp oil, and 1/2 tsp Cajun seasoning mixture.
Mix until vegetables are equally covered with the spice mixture. Put butter on top.