Cut tofu into thick slice.
Slice onion.
Using a wide shallow pot, place kimchi and sauce. Then add pork and onion and scallions over it.
Add salt, sugar, chili flakes and gochujang.
Drizzle sesame oil over the top and add the stock.
Cover and cook for 10 min over medium high heat.
Open and use a spoon to mix the seasoning till they are well combined.
Lay the sliced tofu over the top and cook for another 15 min.
Remove from heat. Top with chopped scallions and serve with rice.