Mix all pork marinade ingredients together. Add pork chops and coat well with marinade for a minimum 1 hour to overnight.
Bring chicken stock to boil in a medium pot and add diced yam. Cook until yam is soft and tender; strain.
In a medium hot pan, add dash of olive oil and fry shallots and garlic until nice and golden brown.
Add yam and crush yam with spoon while mixing with shallots and garlic.
Turn heat off; add chopped sage and coriander. Season with salt and pepper to taste.
In a small pan, heat with a dash of olive oil and fry bok choy facing down. Once stem starts cooking, add soy sauce and keep off heat until plating.
Preheat oven to 375°F.
Heat up a medium pan with dash of olive oil. Once oil is hot, sear pork chop until nice golden brown on both sides. Put in oven to finish, about 8-10 minutes for medium rare to medium. Internal temperature of pork chops should be 145°F for medium rare. Remove and let rest.
Arrange a cup of sweet potato mashed in the middle of the plate. Top with pork chop and arrange bok choy beside the chop.
Notes
Tip - You can use the pan that fried the pork chops and add a few knobs of butter to make sauce for the dish