Cook the noodles as per instructions on packet. Drain and set aside.
Thinly slice the onion and mushrooms.
Chop carrots and potato into rough chunks.
Add olive oil to a large pan/wok and let it heat.
When the oil is hot, bring pan to medium-high heat and add the sliced onions.
After a few minutes, add mushrooms, carrots and potatoes and stir once.
Add salt, pepper and cayenne pepper to coat the vegetables and bring the pan to medium heat.
It will take 8-10 minutes for the vegetables to fully cook. Keep stirring frequently.
While the vegetables are cooking, mix peanut butter, gochujang and soy sauce in a small bowl.
When the vegetables are fully cooked, bring the pan to low heat and add the sauce mixture.
Add half a cup of water to the vegetables and let all of it cook together for a minute.
Now add the cooked noodles in and toss till it is well coated in the sauce.
Sprinkle chopped peanuts on top and serve!
