01 - Bring a large pot of water to a boil. Divide boiling water into separate heatproof bowls equal to the number of desired colors.
02 - Stir a small amount of gel food coloring into each bowl until the preferred shade is reached.
03 - Divide noodles evenly and boil each portion separately in colored water for 2 to 3 minutes less than the package instructions. Rinse cooked noodles under cold water to halt cooking. Set aside.
04 - Melt butter in a saucepan over medium heat. Add cream cheese and stir until smooth and fully combined.
05 - Whisk in milk, parmesan cheese, cornstarch, salt, and white pepper. Stir constantly and cook until thick and creamy, approximately 5 minutes.
06 - Fold colored noodles into the sauce, taking care to preserve distinct hues for a cloud-like effect or gently swirl for a marbled presentation.
07 - Serve immediately topped with sliced scallions, toasted sesame seeds, and edible flowers or microgreens if desired.