Creating Grilled Tuna Steaks with Lemon Butter is a straightforward endeavor. Follow these steps for success:

1. Prepare the Marinade: In a small saucepan, melt the butter over low heat. Add minced garlic, lemon juice, and lemon zest. Stir until combined and set aside.
2. Season the Tuna: Lightly coat the tuna steaks with olive oil, then season both sides with salt and black pepper.
3. Preheat the Grill: Preheat your grill to medium-high heat. Ensure it’s clean and oiled to prevent sticking.
4. Grill the Tuna: Place the seasoned tuna steaks on the grill. Cook for about 3-4 minutes on each side for medium-rare, adjusting time if you prefer a different doneness.
5. Baste with Lemon Butter: During the last minute of grilling, generously brush the melted lemon butter over the steaks for added flavor.
6. Rest the Tuna: Once cooked to your liking, remove the tuna from the grill and let it rest for a few minutes.
7. Serve: Drizzle any remaining lemon butter over the steaks, garnish with fresh parsley, and enjoy!

Each step is designed to ensure you end up with perfectly grilled tuna steaks that are bursting with flavor.