Slow Cooker Pho

1 large yellow onion sliced into 1/2 inch rounds
1 piece 2" fresh ginger, halved lengthwise
1 t neutral oil
2 lbs chuck short ribs
kosher salt
2 t chinese five spice powder
1 cinnamon stick
4 cloves
8 c beef broth
2 T fish sauce
10 oz rice noodles
bean sprouts
basil
mint
cilantro
jalapenos
lime
hoisin

Brush onions and ginger with oil, broil 10 min or until charred in spots
Season short ribs with salt and arrange all in slow cooker.  High for 4 hours or until meat is tender.  Turn off and let rest for 30 min.  Take meat off bones and strain broth.  Season broth with fish sauce and salt, add other ingredients and eat.