Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them very dry with a clean kitchen towel to ensure they get crispy.
Cut the chicken breast into small, bite-sized pieces approximately the same size as the chickpeas.
In a large bowl, toss the dried chickpeas and chicken pieces with the extra virgin olive oil, dried oregano, garlic powder, sea salt, and black pepper until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring there is space between the pieces for even roasting.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden and crisp.
Remove from the oven and immediately sprinkle with the nutritional yeast while still hot to help it adhere.
Place the fresh baby spinach in a serving bowl and top with the warm roasted chickpea and chicken mixture.