Steam cauliflower until very tender; drain then place in a blender or food processor along with the coconut milk; puree until smooth then set aside.
In a large skillet, heat the olive oil over medium-high heat until hot. Add next 7 ingredients (ground beef through salt and pepper); cook for 5 minutes, breaking up ground beef, or until browned.
In a large crock cooker, layer ground beef mixture and cauliflower mash; pour broth over the top. Cover and cook on LOW for 6 to 8 hours or on HIGH for 3 to 4 hours, until beef is cooked through.
Evenly arrange a portion of beef/cauliflower mixture on each dinner plate; top with layers of tomatoes, avocados, lettuce and olives; serve.