To prepare a canned tuna loaf recipe, you'll need: Canned Tuna 1 lb. 2 tbsp. Tomatoes, tomatoes, and thyme (optional) 1/2 cup chopped parsley, 1/2 c. chopped scallions, 1 cup diced romaine lettuce, 2 tablespoons kosher salt, 1/4 teaspoon ground black pepper. Toss the ingredients together. Bake in the oven at 375? for 40 to 45 minutes, or until the cheese is melted and the bread is lightly browned. Serve warm.