Line a small sheet pan with foil, and preheat your oven to broil.Prepare the tuna salad by mixing the tuna, herbs, mayonnaise, lemon, chives, onion powder, and garlic powder until well combined.
Step 2
Place the slices of bread on the lined sheet pan. Divide the tuna between the two slices of bread, and top with generous slices of tomato. Top with cheddar cheese.
Step 3
Broil for 2-3 minutes until cheese is melted. Remove from oven, add lettuce, and serve immediately.