Preheat the oven to 400°F (204°C).
Pour the coconut milk into the bottom of a baking dish, then add 1/4 cup of hot water to the can, swirl to extract remaining milk, and add to the dish.
Whisk in the red curry paste, Soyaki sauce, and minced garlic until well combined.
Add the diced red pepper, sliced mushrooms, and chopped kale to the sauce.
Place the frozen vegetable dumplings on top of the sauce and vegetables and spoon some sauce over them.
Cover the baking dish tightly with foil and bake for 20 minutes at 400°F (204°C).
Remove from oven and garnish with crunchy chili onion oil, fresh cilantro, and green onions if desired.
Serve hot on their own or over rice or rice noodles.