Heat up that grill of yours. If you don't have a grill, invest in one. Or cook them on your stove top. Whatever.
Add all the ingredients for the steaks into a large mixing bowl and use your hands to get after it. Mix everything thoroughly. Then make the meat into oval patties. Why ovals? I'm guessing that's what makes them salisbury steaks. I don't know. Just make them oval.
Put your oval patties on the grill to cook. They will need to cook for about 3-5 minutes each side depending how thick you made them and how pink you want them inside.
While the patties are on the grill, make the gravy. Add your fat, onions, and garlic to a saute pan over medium-high heat. Let the onions cook until they become translucent. Add the rest of your ingredients including the coconut milk, broth, mushrooms and seasonings.
Mix together and let cook down a bit. Once the onions are beginning to soften, cover the pan and turn the heat down low to let cook, stirring occasionally.
Once the burgers and gravy are done, top the steak burgers with the mushroom gravy, and ENJOY! So tasty!
Recipe by PaleOMG - Paleo Recipes at http://paleomg.com/salisbury-steak-burgers-with-mushroom-gravy/