150g fresh white fish fillet (e.g., snapper or grouper)
100ml coconut milk
1 small onion, finely chopped
1 garlic clove, minced
1 small tomato, diced
1 small chili, sliced (optional)
1 tsp fresh ginger, grated
1 tbsp vegetable oil
Salt and pepper to taste
Fresh cilantro for garnish
Juice of half a lime