To prepare a thirty minute baked tuna burgers recipe, you will first need to prepare your ingredients. You will need: 1 pound jumbo patty, 2 tablespoons mayonnaise, 1 tablespoon ketchup, 1/2 teaspoon salt, and 1 teaspoon pepper. Preheat the oven to 375 degrees F (190 degrees C). Place the bread crumbs, melted butter, onion powder, garlic powder and salt into the large bowl. Toss the ingredients together until they are evenly coated. Spread the mixture evenly on the buns. Bake for 30 minutes or until the tops are golden brown. Remove from oven and allow to cool for 5 minutes before slicing.