Preheat oven to 400 degrees F (200 degrees C).
Heat the Olive Oil (1 1/2 tablespoon) in a large frying pan. Add the Onion (1/2) and fry until glassy.
Add the Baby Potato (8) and fry for about 8 minutes, until golden.
While the potatoes are cooking, slice the Skinless Hake Fillets (300 gram) into 2-centimeter cubes.
Place Green Beans (1 1/2 cup), Celery (4 stalk), Carrot (1), and Baby Corn (1 cup) in with the potatoes and stir fry for about 3 minutes. Remove from heat.
Mix the fish in gently with the vegetables then pour everything into a casserole dish or individual pie dishes. Pour the Coconut Milk (1 1/2 cup) over the top and season with Salt (1/2 teaspoon) and Ground Black Pepper (to taste).
Bake for about 30 minutes, until the vegetables are tender and the fish is cooked through. Give the pie a stir halfway through cooking time.
Top evenly with Dutch Gouda (1 cup) and bake for another 10 minutes, until the cheese is golden and bubbling.