I just made the greatest sandwich... Turkey burger saute'd in mushroom and onion until crisp: The buns each to their own glory: One bun with feta on it and then put in the toaster oven - when the toast is toasty and the feta is melted take the bun out of the oven and use the feta as a spread and spread it all over the bun - encompassing the entire bun so that every bite has a feta taste. The other toasted bun spread the entire bun with pesto. While the burger is cooking in the saute' of onions and mushrooms- take the saute' and put in on the burger. On top of the burger I put thinly sliced Roma's and small tid bits of Spinach. I then covered the whole burger with Mozzarella cheese and covered the burger and all of it's toppings. Then when you put the sandwich together and take a bite - the infusion of flavor makes a unique combination of flavors that shocks your taste buds! When you give it to your guest play a game have them guess the ingredients. I think they won’t be able to indentify it because of the infusion of all which makes an entire new flavor!