01 - Bring a large pot of water to a boil. Divide boiling water into separate heatproof bowls based on the number of colors desired.
02 - Add a small amount of gel food coloring to each bowl, stirring thoroughly until the shade reaches desired vibrancy.
03 - Divide the noodles evenly and cook each portion separately in colored boiling water for 2 to 3 minutes less than package instructions to retain firmness. Drain and rinse with cold water to halt cooking; set aside.
04 - In a saucepan over medium heat, melt the butter. Add cream cheese and stir until the mixture becomes smooth and well incorporated.
05 - Whisk in milk, parmesan cheese, cornstarch, salt, and white pepper. Continue stirring constantly for approximately 5 minutes until the sauce thickens and develops a creamy texture.
06 - Gently fold the cooked noodles into the sauce, maintaining clear separation of colors for a cloud effect or lightly swirling for a marbled appearance.
07 - Immediately portion onto plates. Top with sliced scallions, toasted sesame seeds, and, if preferred, edible flowers or microgreens.