Spicy Fish Stew with Shredded Cabbage

Fish is versatile and it creates a sufficient yumminess depending on your preference and preparation. 
Here are the ingredients to prepare and steps to follow for this simple and tasty stew.
12 kilo of fish,
 oil; 
3 large tomatoes, sliced; 
1 medium sized onion, cut into small pieces; 
3 cloves of garlic, minced; 
1 teaspoon, crushed black pepper;
 4 pcs. of red chili, cut;