If cooking quinoa, cook according to package instructions. If using a rice cooker or an Instant pot, cook as you would white rice. If using already cooked quinoa, skip this step.
In a bowl, combine chickpeas with salt and all the spices. OPTIONAL: oil the chickpeas before adding spices.
Preheat the oven to 400°F. Roast the chickpeas on a foil-lined baking sheet for 20-25 minutes.
While the chickpeas are roasting In a bowl, combine quinoa, parsley, chopped tomatoes and chopped cucumber. Squeeze in the juice of one lemon. OPTIONAL: add olive oil. Mix everything together. Set aside.
Grill the zucchinis (or fry in a grill pan) for 3-4 minutes per side to get grill marks. The zucchini slices should be softened but not mushy. Set aside.
Pull the garbanzos from the oven and let cool.
Layer the tabbouleh, the zucchini and the garbanzos in individual serving containers or on large container. Top with dollops of hummus. Serve cold.