Finely chop the onion, garlic, and ginger.
Heat the peanut oil in a large pot and sauté the onion, garlic, and ginger for 5 minutes until translucent.
Add the red curry paste and stir well. Then deglaze with the chicken broth, coconut cream, fish sauce, and the chopped tomatoes. Add the cane sugar and bring the mixture to a boil.
Add the pak choi and let the soup simmer for another 3 minutes.
While the soup is simmering, cook the gyozas in a separate pot for 3 minutes.
Add the cooked gyozas to the soup.
Finish the soup with the chopped spring onions, crispy onions, chili oil, and the zest and juice of the lime. Serve immediately in deep bowls.
Tips
Gyoza's: add the gyozas just before you serve, otherwise they become mushy. Variation: You can also make this soup with green or yellow curry paste. Replace the Bokchoy with beans, mushrooms or fried eggplant for another twist. Serving suggestion: Add some extra chili oil for a spicy kick!