Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Rinse and thoroughly pat the chickpeas dry with a paper towel to ensure they get crispy.
Toss the chickpeas with nutritional yeast and a pinch of sea salt, then spread them in a single layer on the baking sheet.
Roast the chickpeas for 20 minutes, shaking the pan halfway through, until they are golden and firm.
While chickpeas roast, combine the cooked quinoa, spinach, diced cucumber, and halved cherry tomatoes in a large serving bowl.
In a small jar or bowl, whisk together the tahini and lemon juice, adding a teaspoon of warm water at a time until it reaches a pourable consistency.
Remove the chickpeas from the oven and add them to the salad bowl.
Drizzle the lemon tahini dressing over the top and toss gently to combine before serving.