Preheat broiler oven. Smear butter on the bottoms of 2 carnivore buns and place buttered side up on a rimmed baking sheet. Place in broiler oven for 1 minute or until toasted.
2
Remove from oven and place a slice of meatloaf onto one bun and a slice of cheese, if using on the other toasted bun. Place in broiler for one minute until cheese is melted and meatloaf is warm.
3
Remove from oven and place the bun with the meatloaf on top of the bun with cheese. Serve warm. Best served fresh.