Heat oil in a pan, add the whites of the scallion and cook for 2 minutes. Next add the shredded cabbage, carrot and broccoli (if using).
Cook for 3~4 minutes on medium-high flame until the veggies are fork tender.
Add sriracha sauce, tomato ketchup, soy sauce and salt & pepper. Mix well and cook for 1 minute. Turn off the heat.
In a mixing bowl, add the fried noodles, roasted peanuts, cooked veggies, scallion greens, lemon juice and chopped cilantro. Mix well -- taste and adjust the seasonings accordingly and serve right away.