01 - Fill a large pot with water and bring to a rolling boil. Separate boiling water into individual heatproof bowls according to desired color quantity.
02 - Add a small amount of gel-based food coloring to each bowl, stirring thoroughly until the water reaches the preferred intensity.
03 - Divide noodles evenly and cook each portion in the colored boiling water for 2 to 3 minutes less than package instructions. Rinse cooked noodles under cold water to halt cooking and maintain vibrancy. Set aside.
04 - In a saucepan over medium heat, melt butter. Add cream cheese and stir until fully smooth and incorporated.
05 - Whisk in milk, parmesan cheese, cornstarch, salt, and white pepper. Continue stirring until sauce thickens and achieves a silky, cloud-like texture, about 5 minutes.
06 - Gently fold colored noodles into the creamy sauce, aiming to keep hues distinct for a striking presentation, or swirl for a marbled effect.
07 - Transfer noodle mixture to serving plates. Top with sliced scallions, toasted sesame seeds, and edible flowers or microgreens if desired. Serve immediately.