Instructions
Step 1
In a large bowl, stir together the gochujang, 1 tablespoon of the oil, the gochugaru, honey, paprika, black pepper, salt, and garlic. Add the chicken, toss to coat, cover, and refrigerate for 30 minutes.
Step 2
Bring a pot of salted water to a boil, add the fettuccine and cook, stirring occasionally, until al dente, 8–10 minutes. Reserve 1⁄2 cup of the pasta water. Strain the pasta.
Step 3
In a bowl, whisk together the cream, soy sauce, and scallion whites. To a large skillet set over medium heat, add the remaining oil. When it is hot, cook the chicken, stirring frequently, until lightly browned, 2–3 minutes. Stir in the mushrooms and cook until softened, 2–3 minutes. Add the cream mixture and simmer until the chicken is fully cooked, 8–10 minutes. Stir in the fettuccine and cook until the sauce has thickened, 2–3 minutes (if the mixture becomes too dry, stir in 1 tablespoon of pasta cooking water at a time to loosen slightly). Stir in the scallion greens and parmesan (if desired) and serve warm.