Cauliflower and Broccoli Salad

1 large bunch of broccoli
1/2 head cauliflower
1 small red onion
1 cup sunflower seeds
1 lb bacon, diced and fried

2 tsp vinegar
1/3 cup sugar
1 cup Miracle Whip

Cut broccoli, cauliflower, and onion into small pieces. Add bacon and sunflower seeds. Mix dressing and pour over all.