Steam the cauliflower for 8 minutes in a steamer or in boiling water, until soft when poked with a fork.: The steam should coax out the cauliflower's natural sweetness and soften it into pillowy pieces, filling the kitchen with a faint, vegetal aroma. You want the florets to be easily pierced with a fork, which indicates they will puree smoothly. Steam rather than overboil to preserve flavor, and avoid under steaming because gritty bits can remain in the sauce. A common mistake is overcrowding the steamer, which leads to uneven cooking; give the florets room to steam evenly.
Transfer steamed cauliflower to a high-powered blender along with the rest of the sauce ingredients.: As soon as the cauliflower is tender, move it into the blender with beef bone broth , ghee , stone ground mustard , and the small pinch of sea salt . The warm cauliflower helps the sauce emulsify into a silky texture, and the smell becomes richer as the ghee and mustard mingle. If you wait too long and the cauliflower cools, the blend may be less smooth, and the sauce can be grainier; work while still warm for the best result.
Blend until completely smooth. If necessary, add more broth to thin out the sauce to desired consistency.: Blending until the mixture is completely smooth creates a velvety sauce that clings to the meatballs. Listen for the blender's steady hum turning into a quieter, even sound, and watch for a uniform creamy color with no visible cauliflower bits. If the sauce is too thick for your liking, add beef bone broth a little at a time to reach a spoonable but pourable texture. Over thinning will make the sauce runny, so adjust cautiously, and be mindful that the sauce thickens slightly when warmed.
Taste sauce for flavor and add more ghee and/or sea salt to taste. Set aside until ready to use.: This tasting step is where you balance richness and seasoning, and you should immediately notice a round, savory base with a hint of tang from the mustard. If it tastes flat, a touch more sea salt brightens everything; if it needs body, an extra tablespoon of melted ghee will smooth and enrich the mouthfeel. Set the sauce aside warm, because integrating warm sauce with hot meatballs helps meld flavors quickly. Avoid over seasoning early, because the meatballs will add salt and richness later.
Add all ingredients for the meatballs to a mixing bowl and use your hands to mix everything together until well-combined (note: you can also perform this step using a stand mixer with the paddle attachment).: you can also perform this step using a stand mixer with the paddle attachment) : When you combine the grass fed ground beef , tapioca flour , fresh parsley , yellow onion , garlic powder , eggs , ground nutmeg , and sea salt , touch matters more than force. Use your hands to mix just until everything is evenly distributed; you want a cohesive mixture without overworking the meat, which can make the meatballs dense. You should feel the mixture become springy and slightly tacky. A common pitfall is overmixing, which tightens the protein and yields a dry finished meatball.
Form meatballs 1.5 to 2 inches in diameter and place on a plate.: Roll the mixture gently between your palms into even spheres, aiming for consistency so they cook uniformly. As you form them, notice the smooth outer crust created by gentle rolling, and keep your hands slightly damp if the mixture sticks. Placing them on a plate in a single layer prevents flattening or misshaping. Avoid compacting them too firmly, because that compresses juices and leads to a tougher center.
Heat 2 tablespoons avocado oil or cooking oil of choice in a large cast iron skillet over medium-high heat. Once hot, place the meatballs on the hot skillet, giving each one plenty of room (you’ll need to do this in 2 to 3 batches). Cook 2 minutes, flip to the other side and cook another 2 to 3 minutes, until browned on 2 sides. Transfer to a plate.: You should hear an immediate sizzle as the meatballs hit the hot oil, and that sound is a great indicator of proper searing. Browning creates Maillard flavor, which gives the exterior a savory crust and deep color. Work in batches to avoid crowding, because too many meatballs in the pan will release steam and prevent browning. The visual cue is a deep golden brown on two sides. If you try to move them too soon they will stick, so let them form a crust first.
Wipe out the skillet, lower the heat to medium-low and add the sauce. Bring sauce to a gentle boil then add the meatballs and stir. Cover and cook until meatballs are cooked through, about 5 to 8 minutes. For more developed flavor, cook meatballs at a very gentle simmer over medium-low heat for 30 to 60 minutes, stirring occasionally.: When the sauce warms and begins to steam, it releases rich aromas of ghee and bone broth , and combining it with the browned meatballs completes the flavor. You want a gentle boil or simmer so the meatballs finish cooking through and soak up sauce flavor without breaking apart. Cooking for the short window yields tender juicy centers, while a longer gentle simmer deepens flavor and melds the sauce. Avoid high heat at this stage because it can toughen the meat and reduce the sauce, possibly causing it to separate. Stir occasionally to prevent sticking and to ensure even cooking throughout.