Cider-Braised Short Ribs over Easy Garlic Mashed Potatoes

beef short ribs (4 single ribs)

salt

Tb fat of choice

homemade apple cider OR hard cider of choice

large red or sweet yellow onion, sliced

large apple, sliced

large russet potatoes (about 2 ½ cups roughly chopped)

garlic, minced

coconut milk