Preheat oven to 400 degrees F. Toss broccoli in oil and season with salt and pepper. Transfer to a baking sheet and roast until golden brown and softened slightly, about 15 - 20 minutes.
While broccoli is roasting, prepare the dressing. Whisk together all the dressing ingredients until smooth. The mixture will be thick, so whisk in water a splash at a time until it's runny enough to pour.
When broccoli is done, remove from oven and transfer to mixing bowl. Add quinoa and almonds, and toss to combine.
Pour dressing over broccoli-quinoa mixture and stir until evenly coated.
Serve immediately (for a warm salad) or chill in fridge for at least two hours.