The Supreme Tuna Melt – City Seafood

Ingredients

• ½ cup mayo
• 1 tsp wasabi paste
• 2 (8oz) fresh tuna steaks (1” thick)
• 1 Tbsp canola oil
• 1 tsp salt
• ½ tsp black pepper
• ¾ cup gruyere cheese
• 1 avocado seeded, peeled, and sliced
• ¾ cup shredded cheddar cheese
• 4 pieces (1/2” thick) French boule or pane toscano bread
• ½ cup salted butter, softened