2 garlic cloves, crushed
1 tsp garlic powder
陆 lime, juice only
1 tbsp dried thyme
1 tsp black pepper
1 tsp cayenne pepper
1 tbsp mustard powder
1 tbsp dried oregano
2 tsp salt
1 tbsp sweet smoked paprika
1 tsp white pepper
knob butter, plus more if needed
4 sea bream or other firm white fish fillets, skin removed