In a medium saucepan, combine the rinsed quinoa with the vegetable broth. Bring to a boil, then reduce to a simmer. Cover and cook for about 15 minutes or until the liquid is absorbed. Fluff with a fork and set aside.
On a large baking sheet, toss the diced zucchini, bell pepper, cherry tomatoes, and red onion with olive oil, garlic powder, smoked paprika, salt, and pepper. Spread the vegetables in an even layer and roast in the preheated oven for 20-25 minutes, or until tender and lightly charred.
In a large bowl, combine the cooked quinoa, roasted vegetables, and fresh spinach. Toss gently to combine. The heat from the vegetables will slightly wilt the spinach.
Divide the quinoa and vegetable mixture into bowls. Top with crumbled feta cheese if desired and garnish with fresh parsley.
Notes
Drizzle a little extra olive oil or a squeeze of lemon juice over each bowl before serving for added flavor.