Preheat the oven to 400°F and line a large baking sheet with parchment paper.
Thoroughly pat the canned chickpeas dry with a clean kitchen towel to ensure maximum crispiness during roasting.
Place the cubed chicken breast, sliced cremini mushrooms, and dried chickpeas on the baking sheet.
Drizzle with olive oil and season with sea salt, black pepper, and garlic powder, tossing until every piece is well-coated.
Roast for 20 to 22 minutes, or until the chicken reaches an internal temperature of 165°F and the mushrooms are browned.
Arrange the fresh baby spinach and warm cooked quinoa in a large bowl as the base.
Spoon the roasted chicken, mushrooms, and chickpeas over the spinach and grain base.
Finish the bowl with a fresh squeeze of lemon juice and a sprinkle of hemp hearts for a nutty texture.