Set the seasoning packets from the ramen aside. Crush the ramen noodles into a salad bowl, then add the slaw, peas and corn and toss.
In a microwave-safe bowl, combine the sugar, oil, vinegar and ramen seasoning packets; microwave on high for 1 minute. Pour the hot dressing over the slaw mixture and toss. Cover and refrigerate for 3 hours (or overnight).
Toss in the sunflower seeds just before serving.
Notes
Note: I left the red onion out of this recipe, but you can certainly add in 1 cup of thinly sliced red onion if you'd like!