Add the avocado oil to a large skillet and heat to medium-high. Add the chopped onion and sprinkle liberally with sea salt. Cover the skillet and cook, stirring occasionally, until the onion begins to turn brown, about 8 to 10 minutes. We’re trying to get the onion to a near-caramelized state quickly in order to maximize its flavor potential.

Stir in the chopped mushrooms and garlic and continue cooking until the mushrooms have softened and turn brown, about another 5 minutes. Move the veggies off to the side and add the ground beef. Allow it to brown for 2 to 3 minutes per side, then use a spatula to break it into smaller chunks and mix well. Continue cooking and stirring until the ground beef has cooked through and no pink is left.

Add the oregano, spinach, and sea salt and stir well. Cover the skillet and cook until the spinach has wilted, about 3 minutes. Taste the mixture for flavor and add more sea salt or a splash of liquid aminos or soy sauce to taste.

Serve with your choice of side dishes, and enjoy!