In a large mixing bowl, combine the broccoli florets, cheddar cheese, red onion, bacon, raisins, and sunflower seeds.

In a separate bowl, whisk together the mayonnaise, apple cider vinegar, sugar, salt, and black pepper until smooth.

Pour the dressing over the salad mixture and toss until everything is well coated. Serve immediately or refrigerate for 30 minutes to allow flavors to meld.