Making this White Chicken Chili Bake is straightforward. Just follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Sauté Vegetables: In a large skillet, heat olive oil over medium heat. Add chopped onion and sauté until translucent, about 5 minutes. Stir in minced garlic and cook for an additional minute.
3. Combine Ingredients: In a large mixing bowl, combine cooked chicken, white beans, diced tomatoes, corn, sautéed onions and garlic, chicken broth, chili powder, cumin, salt, and pepper. Mix well until all ingredients are evenly distributed.
4. Transfer to Baking Dish: Pour the mixture into a greased 9×13 inch baking dish, spreading it evenly.
5. Add Cheese: Sprinkle shredded cheese generously over the top of the mixture.
6. Bake: Place in the preheated oven and bake for 25-30 minutes, or until the cheese is bubbly and golden.
7. Garnish: Remove from the oven and let cool slightly. Garnish with fresh cilantro if desired before serving.

These simple steps will guide you in creating a delightful White Chicken Chili Bake that will impress everyone at the table.