You do not have to make a mixture for the Turkey Patties. You can use the shortcuts, brand suggestions: Ballpark, Purdue, Jenny O, etc. -Frozen (thaw first) or already made patties, ready to cook/grill. It is your choice which brand you prefer. Also, you can ADD Beef, Chicken, or Lamb. I added 4 thick patties, however, you can make smaller sized patties. Serving size: it should be for 4 people if you have sides. Turkey Seasoning: This is not a burger, if it's for a burger, usually I'd add sage and thyme to the meat mixture, as well as panko breadcrumbs and an egg. Since we are adding it in the sauce, it is just little seasoning for the meat, so it wouldn't be plain patty. Sour Cream would not work for this, although it will not have a bad outcome, it just will not look, nor taste the same. Yogurt: I am in LOVE with the "Stony Field-Organic". It is a bit pricey comparing it to the other brands, but it tastes fantastic. It is usually stored in the health/organic part of the grocery store.