Steam broccoli florets until just tender, 5 to 7 minutes. Once cool, chop and combine with chickpeas, scallions, parsley, and pine nuts.
In a bowl, combine garlic, mustard, honey, lemon zest and juice. Slowly add oil, whisking to emulsify, and season with salt and pepper.
Drizzle broccoli mixture with dressing and adjust seasoning.