Combine broccoli, onion, sunflower kernels, raisins, and bacon in a large bowl. Set aside.
Stir together Greek yogurt, sugar, and vinegar in a small bowl. Pour over the top of broccoli mixture and stir evenly to coat.
Tastes great when served immediately. If you need to refrigerate it for later, you may want to prepare a bit more of the dressing to add in case it gets a little dry.
