To make the hamburger "steaks" combine the ground beef with the eggs, salt, pepper, garlic, onion powder, and mustard in a large bowl - mixing until well combined. Then form into eight equal patties. You will want to make them as thin as possible.
Place the patties in a hot skillet and cook until done. Remove from the pan and set aside.
Add 1 can of beef broth to the skillet with the beef drippings*, stir to loosen any stuck on bits from the bottom of the pan. Add the heavy cream and bring to a simmer.*I used 80/20 ground beef for this recipe, if you use a fattier beef you should remove some of the grease before adding the beef broth. Reserving around 2-3 tbsp worth.
Allow the gravy to reduce by about half, then begin adding your xanthan gum in 1/4 tsp increments - stirring thoroughly after each addition, until you get a gravy-like consistency. I used about 1/2 tsp for this recipe, but that amount may vary depending upon how much you reduce your sauce.
Serve the cooked "steaks" topped with gravy and enjoy!
Nutrition info for 1 serving: 282 calories, 19.8g fat, 1 carb, 0.3g fiber, 22.3 g protein. 0.7 net carbs!