Preheat oven to 375º. Lightly oil 9 x 9 baking dish or 10 inch cast iron skillet.
Prepare pasta according to package directions. Drain and return to pot.
Place cashews, milk, nutritional yeast, oil, vinegar and salt into food processor and blend until smooth, stopping to scrape down sides of bowl as needed. Add to pot with pasta. Add kimchi and stir to incorporate ingredients. Transfer to prepared baking dish or cast iron skillet.
Sprinke with panko and gochugaru if using. Bake 20-25 minutes, or until lightly browned on top.