For a hearty and protein-packed dinner, try marinating tuna steaks in a soy sauce-based marinade. The soy sauce adds a savory umami flavor to the fish, while the marinade helps to tenderize the meat. Grill or sear the tuna steaks for a few minutes on each side until they are cooked to your desired level of doneness. Serve with a side of roasted potatoes and a fresh salad for a well-balanced meal.