pre-sliced Portobello mushrooms • coarsely chopped shallots • lightly packed fresh Italian parsley • Lbs. Lean (93%) ground turkey. I use 1 pkg of Butterball • extra-virgin olive oil, plus more for brushing • Worcestershire sauce • Kosher salt and freshly ground pepper • Thin slices manchego or white cheddar cheese • Sandwich thins, or, onion buns. Whichever you prefer • Dijon mustard, mayonnaise and sliced avocado for topping • Add other toppings if you wish (e.g. tomatoes, onions)