Place broccoli, tomatoes, bacon, red onion, and sunflower seeds in a large bowl.
In a separate bowl, combine goat cheese, yogurt, vinegar, Everything Bagel Seasoning, sugar, and a pinch of salt and black pepper; whisk until smooth. Stir in chives.
Pour dressing over broccoli salad and mix until well-combined. Cover and refrigerate for 1 hour for best results. Sprinkle with extra Everything Bagel Seasoning before serving, if desired.
