Melt margarine in a saucepan. Add in flour and stir in milk gradually until slightly thick. Set aside.
Heat margarine or oil and saute garlic and onions until soft.
Add the corn and fish then pour in water and season with salt and pepper.
Simmer for about 20 minutes. Then add carrots and tomato sauce.
Simmer for another 10 minutes. Then stir in the flour mixture.
Stir cook until slightly thick then add the malunggay leaves then simmer for 5 minutes more.
Serve hot and garnish with spring onions.