Creating this amazing Kimchi Mac and Cheese is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Cook Pasta: In a large pot, bring salted water to a boil. Add elbow macaroni and cook until al dente, about 8 minutes. Drain and set aside.
3. Make Cheese Sauce: In a saucepan, melt butter over medium heat. Stir in flour, garlic powder, onion powder, salt, and black pepper. Cook for 1-2 minutes until golden.
4. Add Milk: Gradually whisk in the milk. Continue to cook, stirring constantly, until the mixture thickens and bubbles, about 5-7 minutes.
5. Add Cheese: Remove from heat and stir in the cheddar and mozzarella cheeses until melted and smooth.
6. Combine with Kimchi: Stir in the chopped kimchi and cooked macaroni, mixing until well combined.
7. Transfer to Baking Dish: Pour the mac and cheese mixture into a greased 9×13-inch baking dish.
8. Top with Breadcrumbs: Sprinkle the panko breadcrumbs evenly over the top for a crunchy finish.
9. Bake: Bake in the preheated oven for 20 minutes or until the top is golden brown and bubbly.
10. Garnish and Serve: Remove from the oven and let cool for a few minutes. Garnish with chopped green onions before serving.