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["Combine all the patty ingredients in a mixer with paddle attachment or mixing bowl to knead together by hand.", "The mixture should pull together smoothly, don't over mix.", "Form into oval patties, approximately 3/4"" thick.", "Set aside patties and assemble the Mushroom sauce in a large saute pan starting over medium high heat and 4 tablespoons butter.", "When butter stops foaming, add the onions and mushrooms, cooking until onions are translucent and mushrooms have given up some of their liquid.", "Add the garlic, Thyme and the unsalted beef broth and reduce by half.", "Add salt and pepper to taste.", "Add white wash slurry and stir to thicken (about 4 tablespoons flour mixed with a little cold water until smooth).", "If opting for low carb, skip this step.", "(see step 7 later on).", "Remove mushroom sauce from heat.", "Bring a heavy bottomed fry pan (preferably cast iron) to high heat.", "Place patties in pan and sear on both sides.", "Place into 13 x 9 casserole dish.", "Pour gravy over and place in 350 degree oven for 20-30 minutes.", "For low carb option, thicken sauce by adding cold unsalted butter one pat at a time and stirring until smooth gravy forms.", "Serve immediately."]