Preheat and prep. Get your oven to 400°F. This is literally the hardest part of the recipe, so if you can handle this, you're golden.
Make the magic sauce. In a large baking dish, combine gochujang paste, minced ginger, minced garlic, soy sauce, rice wine vinegar, and sesame oil. Whisk it all together until it looks like it wants to be friends. Now add the coconut milk and whisk again until everything's combined and creamy.
Layer like you mean it. Add the chopped bok choy and green onions in an even layer over the sauce. Don't stress about perfect distribution—this isn't Instagram, it's dinner. Then top with your frozen dumplings. Don't thaw them first; frozen is perfect here.
Bake and forget. Stick the whole thing in the oven for 15 minutes, or until the dumplings are cooked through and the bok choy is tender but still has some bite. The sauce will bubble and thicken slightly, which is exactly what we want.
Finish with flair. Top with chopped green onions, cilantro, a drizzle of crispy chili oil (if you're into that), and a sprinkle of sesame seeds. This isn't just for looks—these toppings add texture and freshness that make each bite interesting.