Heat the oil in a frying pan and fry the fish for 2-3 minutes on each side, or until golden brown. Set aside to cool slightly, then slice. Place the chayote, eggplants, green beans and fish slices in a large saucepan.
Mix the shrimp paste with water until smooth, then pour into the saucepan.
Simmer over medium heat for 10-15 minutes until vegetables a