Brush the halibut steaks with oil and season with salt and pepper.
Press the breadcrumbs onto both sides of the fish steaks.
Fry the halibut in oil over medium heat for 4 minutes per side until golden.
Remove the fish and keep warm while preparing the sauce.
Fry sliced shallots, garlic, and ginger in the same pan for 4 minutes until soft.
Add cherry tomatoes and cook until they begin to burst open.
Stir in the vinegar, sugar, ketchup, and fish sauce and simmer for 3 minutes.
Spoon the sauce over the fish and garnish with coriander and spring onions.
Serve immediately with steamed jasmine rice.