Place all meat loaf ingredients in a large mixing bowl and knead to combine thoroughly. Transfer to a greased loaf pan and even the surface of the loaf.
Bake for 60 minutes or until a meat thermometer reaches at least 165 F.
While the meatloaf bakes, cook the cauliflower and cool.
When cool enough to touch, transfer to a cheese cloth and wring out as much liquid as you can over the sink.
Once you've gotten as much water out of the cauliflower as you can, transfer it to a blender, food processor or back to the empty pot you cooked it in if you have a stick blender.
Add in the butter and garlic powder and blend until you have a smooth mash.
Remove the meatloaf from the oven and smooth the mash over the meatloaf. Top with a little fresh, chopped parsley and slice to serve.
Notes
Please note that the nutrition data below is a ballpark figure. Exact data is not possible.