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If you're using a gas grill, turn the burners to medium-high. If you're using a charcoal grill, fill a chimney with briquettes and light them. Dump the briquettes onto 1 side of the grill once they're hot and lightly covered with ash. If you're using a broiler, preheat it for at least 5 minutes before cooking the tuna steaks. Remove the marinated tuna steaks from the refrigerator and transfer them from the marinade to a plate. Then, sprinkle 1/4 teaspoon (1.5 g) of salt and 1/4 teaspoon (0.5 g) of ground pepper over the steaks. Discard the marinade once you remove the tuna steaks from the bag. the tuna for 3 to 4 minutes. Set a timer so you don't accidentally overcook 1 side of the tuna steaks. They should become browned on the bottom side that's exposed to the heat. Use tongs to carefully transfer the tuna steaks from the grill to a serving platter. Let the steaks rest while you get side dishes ready. Consider serving grilled tuna steaks with grilled vegetables, couscous, or a garden salad. Refrigerate leftover tuna steaks in an airtight container for up to 3 to 4 days.
Heat a gas or charcoal grill to medium-high. Take the steaks out of the bag and season them with salt and pepper. Grill Remove the tuna steaks and rest them for 5 to 10 minutes before serving.