This is embarrassingly easy. New Seasons sells a fresh gyros lamb sausage. I bought 5 ounces and fried it in a burger shape on the skillet. For the bun, I combined three of the raw English Muffin dough pieces I had stored in the fridge and cooked on a griddle 10 minutes on one side and 5 minutes on the other. The sauce is 2 TBSP of plain yogurt, 1 TBSP of feta cheese, 1 tsp of oregano, 1 tsp of garlic powder and some salt and pepper. A one-minute sauce reminiscent of tsatziki.
The sald is made from three leaves of romaine, 1/2 ounce of feta, 6 olives, 1/4 of a Roma tomato and one green onion sliced finely. I added 1 TBSP of Greek-Feta Vinaigrette.