Bring a small pot of salted water to a boil. Blanch the broccoli florets for 1–2 minutes until bright green and crisp-tender. Drain and rinse under cold water to stop cooking.
In a large bowl, combine the blanched broccoli, halved cherry tomatoes, thinly sliced red onion, croutons, and sunflower seeds if using.
In a small bowl, whisk together olive oil, apple cider vinegar, honey, Dijon mustard, salt, and pepper until emulsified.
Pour the dressing over the salad and toss gently to coat all ingredients evenly.
Let the salad rest for 5–10 minutes before serving to allow flavors to meld. Serve chilled or at room temperature.
Notes
For extra flavor, add crumbled feta cheese or toasted nuts. This salad pairs wonderfully with grilled chicken or fish.