For salsa: Combine mint, parsley, onion, capers, salt, pepper, lime juice
and olive oil. Set aside.
Rub corn with extra oil and grill over medium-high heat until slightly
charred, about 10 min.
While corn cooks combine olive oil, garlic, coriander, salt and pepper
and rub mixture over fish. Place fillets in a grill basket with a few sprigs of mint.
Grill, turning once, until fish is cooked through, 8 to 10 min total.
Cut corn from cobs and serve alongside the fish. Top fish with salsa and mint springs.
Notes
Of course you can broil the fish in the oven or fry it on the stove, but grilling it in a basket gives it that smokey flavor that only comes from the BBQ.