Place the cauliflower florets in a steamer basket over boiling water and cook for 10-12 minutes until very tender.
While the cauliflower steams, heat the olive oil in a large skillet over medium-high heat.
Add the ground beef and minced garlic to the skillet, breaking the meat apart with a wooden spoon.
Season the beef with sea salt, black pepper, dried thyme, and dried rosemary, cooking until the beef is browned and cooked through.
In a small bowl, whisk together the beef bone broth and arrowroot powder until no clumps remain.
Pour the broth mixture into the skillet with the beef and reduce the heat to medium-low.
Simmer the beef for 3-5 minutes, stirring occasionally, until the gravy has thickened and coats the meat.
Drain the steamed cauliflower and transfer it to a bowl; mash with a fork or immersion blender until smooth.
Plate the mashed cauliflower and top with the savory minced beef and gravy.
Garnish with fresh chopped parsley before serving.