01 - Bring a large pot of water to a rolling boil. Divide the water among multiple heatproof bowls based on the number of colors desired.
02 - Add a small amount of gel food coloring to each bowl, stirring until the water reaches your preferred vibrant shade.
03 - Split noodles into equal batches and cook each portion in the colored boiling water for 2 to 3 minutes less than package directions. Rinse immediately under cold running water to halt cooking then set aside.
04 - Set a saucepan over medium heat and melt the butter. Add cream cheese, stirring until the texture becomes smooth.
05 - Whisk in milk, grated parmesan, cornstarch, salt, and white pepper. Continue cooking and stirring until the mixture thickens into a luscious, creamy sauce, approximately 5 minutes.
06 - Gently fold the colored noodles into the sauce, taking care to keep the colors distinct for a cloud-like effect or swirl gently for a marbled presentation.
07 - Serve immediately, topping with scallions, toasted sesame seeds, and, if desired, edible flowers or microgreens for visual flair.