In a small pan, cook the noodles and soup pack in boiling water according to package directions.
When the noodles are partially done, arrange the mushrooms, pork slices and the kimchi (cut into smaller pieces if large) along the edges of the pan.
Drizzle in the kimchi juice.
Continue boiling until the noodles and mushrooms are cooked through, and pork and kimchi are heated through.
With the heat off, lay the cheese slices on top and cover the pan just long enough for the cheese to melt.
Carefully slide the contents of the pan into a bowl.
Drop the egg yolk at the center of the bowl.
Garnish with sliced scallions and chili flakes.
Serve your cheese and kimchi noodles hot.