Cut the loaf into 8 slices (you can make crosswise cuts). Each slice should be about ½-¾ inches thick.
Lightly butter the baking dish.
Spread the cannabutter on one side of each slice of bread. Now arrange these 8 slices, butter side up, into the greased baking dish.
Mix eggs, milk, cinnamon, sugar, vanilla, and salt in another bowl.
Pour the mixture over the bread.
Cover the dish, and refrigerate for at least 4 hours.