Chop up 5 cups of broccoli and two cups of cauliflower. I like to make sure these are in bite sized pieces. Place in a large bowl.
Cook one package of bacon. Once cooled, chop into small pieces and place in the bowl of broccoli and cauliflower.
Next, add in the sunflower seeds and chopped red onion. Mix well.
For the dressing, add mayo and sour cream to a smaller bowl. Add in a pinch of salt and pepper. Then, add in apple cider vinegar and sugar. Mix well.
Next, pour the dressing over the top of the broccoli and cauliflower mix. Stir well.
Place in the refrigerator until you are ready to enjoy.