preheat oven to 450
sift together the salt, flour, baking powder and baking soda
toss in the butter and use knives or a potato masher or your fingers to crumble the butter through the flour mixture to create a nice grainy texture
stir in sage (at this point, you could also add grated cheddar if you so desired)
add little bleps of buttermilk while mixing until it all just holds together and is on the edge of being sticky
pull out onto a floured surface, and with your floured hands form into a 7"x7" square, about 1/2" thick. once I've done that, I like to fold it over itself and smoosh down again so that once it's baked, it has a perfect little breaking point for putting jam/relish in, but follow your hearts.
cut into squares or triangles or rhombi, brush the tops with melted butter, and toss in the oven on a tray for 10-12 mins tops.
CONSUME