Combine all ingredients, except Mahi Mahi fillets in a jar and shake until they are emulsified. (Or whisk together in a bowl.)
Pour ingredients over Mahi Mahi fillets and allow to marinade for at least an hour in the refrigerator.
Heat a large saute pan over medium-high heat. There is oil in the marinade that should prevent it from sticking - but use your discretion based on your history with your saute pan!
Place all 4 fillets in the pan with space between them (do not crowd - if your pan is not big enough, cook in batches). Allow fish to cook without turning until nicely browned, about 4 minutes. Flip fish and allow them to brown on the other side, also about 4 minutes. Fish will flake when done.