This Salisbury Steak in Mushroom Gravy is the kind of comfort food you need in your life. It's incredibly easy to make and that gravy is lick your plate good. Plus it's dairy free, gluten free, and Whole30 compliant.
Combine the lean ground beef, egg, salt, pepper, onion powder, and garlic powder in a large bowl. Use your hands to mix ingredients together and form four patties of the same size.
Heat 2 tablespoons of olive oil (or another cooking fat) in a skillet on medium high heat.
Place your patties in the skillet. Pan should be hot so you'll hear that sizzle when the meat touches the oil. Brown both sides of the hamburger patties, about 4 to 5 minutes per side. Remove the patties from the skillet and set aside.
Mushroom Gravy
Add mushrooms and onions to the skillet along with 1 tablespoon of oil. Reduce heat to medium or medium-low. Sauté for around 2 to 3 minutes so that your onions start to wilt.
Return patties to skillet with the mushrooms and onions. Also add beef stock, tomato paste, minced garlic, chopped fresh rosemary, salt, and pepper. Cover and let everything simmer for 10 minutes. (Your gravy should bubble a little but not truly boil.)
Remove patties from skillet again. Turn off heat. In a small container combine arrowroot flour and water. Shake. Pour the mixture into your gravy and whisk so it's thoroughly mixed in. You'll notice the gravy begins to thicken immediately. Return the patties to the skillet. You're ready to serve!
Notes
Depending on how you buy your ground beef, it can be tricky to get exactly one pound. That's not a problem. I've used a package of 1.15 lbs with no issue so just get close to a pound and you'll be good to go.Make sure you've turned off the stove heat before stirring in your arrowroot flour and water mixture. Unlike flour you don't want to really cook the arrowroot flour into your food or it can lose some of its thickening ability.