01 -  Bring a large pot of water to a boil. Separate into bowls based on desired noodle colors. 
 02 -  Add gel food coloring to each bowl, stirring until evenly distributed and vibrant. 
 03 -  Divide noodles equally. Cook each portion in colored boiling water for 2–3 minutes less than package instructions. Rinse noodles under cold water to stop cooking and set aside. 
 04 -  Melt butter in a saucepan over medium heat. Stir in cream cheese until smooth. 
 05 -  Whisk in milk, grated parmesan, cornstarch, salt, and white pepper. Cook, stirring constantly, until thick, smooth, and creamy, about 5 minutes. 
 06 -  Add noodles to the sauce, gently folding to coat. Preserve color separation for a cloud effect, or swirl lightly for marbling. 
 07 -  Dish immediately. Top with sliced scallions, sesame seeds, and edible flowers or microgreens if desired.